diff --git a/backend/src/db/schemas/models.ts b/backend/src/db/schemas/models.ts
index a46d3ea96..d3537b028 100644
--- a/backend/src/db/schemas/models.ts
+++ b/backend/src/db/schemas/models.ts
@@ -310,6 +310,16 @@ export enum ActionProjectType {
   Any = "any"
 }
 
+export enum TemporaryPermissionMode {
+  Relative = "relative"
+}
+
+export enum MembershipActors {
+  Group = "group",
+  User = "user",
+  Identity = "identity"
+}
+
 export enum SortDirection {
   ASC = "asc",
   DESC = "desc"
diff --git a/backend/src/ee/services/project-user-additional-privilege/project-user-additional-privilege-service.ts b/backend/src/ee/services/project-user-additional-privilege/project-user-additional-privilege-service.ts
index c2876572f..3c6356e9a 100644
--- a/backend/src/ee/services/project-user-additional-privilege/project-user-additional-privilege-service.ts
+++ b/backend/src/ee/services/project-user-additional-privilege/project-user-additional-privilege-service.ts
@@ -292,6 +292,7 @@ export const projectUserAdditionalPrivilegeServiceFactory = ({
     });
     ForbiddenError.from(permission).throwUnlessCan(ProjectPermissionMemberActions.Edit, ProjectPermissionSub.Member);
 
+    // TODO(simp): look into this in the new ap service
     await accessApprovalRequestDAL.update(
       {
         privilegeId: userPrivilege.id
diff --git a/backend/src/services/additional-privilege/additional-privilege-dal.ts b/backend/src/services/additional-privilege/additional-privilege-dal.ts
new file mode 100644
index 000000000..040fbcb0b
--- /dev/null
+++ b/backend/src/services/additional-privilege/additional-privilege-dal.ts
@@ -0,0 +1,10 @@
+import { TDbClient } from "@app/db";
+import { TableName } from "@app/db/schemas";
+import { ormify } from "@app/lib/knex";
+
+export type TAdditionalPrivilegeDALFactory = ReturnType<typeof additionalPrivilegeDALFactory>;
+
+export const additionalPrivilegeDALFactory = (db: TDbClient) => {
+  const orm = ormify(db, TableName.AdditionalPrivilege);
+  return orm;
+};
diff --git a/backend/src/services/additional-privilege/additional-privilege-service.ts b/backend/src/services/additional-privilege/additional-privilege-service.ts
new file mode 100644
index 000000000..803a581b0
--- /dev/null
+++ b/backend/src/services/additional-privilege/additional-privilege-service.ts
@@ -0,0 +1,208 @@
+import { RawRule } from "@casl/ability";
+import { packRules } from "@casl/ability/extra";
+
+import { AccessScope, TemporaryPermissionMode } from "@app/db/schemas";
+import { TPermissionServiceFactory } from "@app/ee/services/permission/permission-service-types";
+import { BadRequestError, NotFoundError } from "@app/lib/errors";
+import { ms } from "@app/lib/ms";
+import { validateHandlebarTemplate } from "@app/lib/template/validate-handlebars";
+import { unpackPermissions } from "@app/server/routes/sanitizedSchema/permission";
+
+import { TMembershipDALFactory } from "../membership/membership-dal";
+import { TOrgDALFactory } from "../org/org-dal";
+import { TAdditionalPrivilegeDALFactory } from "./additional-privilege-dal";
+import {
+  TAdditionalPrivilegesScopeFactory,
+  TCreateAdditionalPrivilegesDTO,
+  TDeleteAdditionalPrivilegesDTO,
+  TGetAdditionalPrivilegesByIdDTO,
+  TListAdditionalPrivilegesDTO,
+  TUpdateAdditionalPrivilegesDTO
+} from "./additional-privilege-types";
+import { newNamespaceAdditionalPrivilegesFactory } from "./namespace/namespace-additional-privilege-factory";
+import { newOrgAdditionalPrivilegesFactory } from "./org/org-additional-privilege-factory";
+import { newProjectAdditionalPrivilegesFactory } from "./project/project-additional-privilege-factory";
+
+type TAdditionalPrivilegeServiceFactoryDep = {
+  additionalPrivilegeDAL: TAdditionalPrivilegeDALFactory;
+  permissionService: Pick<TPermissionServiceFactory, "getProjectPermission">;
+  orgDAL: Pick<TOrgDALFactory, "findById">;
+  membershipDAL: Pick<TMembershipDALFactory, "findOne">;
+};
+
+export type TAdditionalPrivilegeServiceFactory = ReturnType<typeof additionalPrivilegeServiceFactory>;
+
+export const additionalPrivilegeServiceFactory = ({
+  additionalPrivilegeDAL,
+  permissionService,
+  orgDAL,
+  membershipDAL
+}: TAdditionalPrivilegeServiceFactoryDep) => {
+  const scopeFactory: Record<AccessScope, TAdditionalPrivilegesScopeFactory> = {
+    [AccessScope.Organization]: newOrgAdditionalPrivilegesFactory({}),
+    [AccessScope.Project]: newProjectAdditionalPrivilegesFactory({
+      membershipDAL,
+      orgDAL,
+      permissionService
+    }),
+    [AccessScope.Namespace]: newNamespaceAdditionalPrivilegesFactory({})
+  };
+
+  const createAdditionalPrivilege = async (dto: TCreateAdditionalPrivilegesDTO) => {
+    const { scopeData, data } = dto;
+    const factory = scopeFactory[scopeData.scope];
+    const { membershipId } = await factory.onCreateAdditionalPrivilegesGuard(dto);
+
+    const existingSlug = await additionalPrivilegeDAL.findOne({
+      name: data.name,
+      membershipId
+    });
+    if (existingSlug) throw new BadRequestError({ message: `Additional privilege with name ${data.name} exist` });
+
+    validateHandlebarTemplate("Additional Privilege Create", JSON.stringify(data.permissions || []), {
+      allowedExpressions: (val) => val.includes("identity.")
+    });
+
+    if (!data.isTemporary) {
+      const additionalPrivilege = await additionalPrivilegeDAL.create({
+        membershipId,
+        name: data.name,
+        isTemporary: data.isTemporary,
+        permissions: JSON.stringify(packRules(data.permissions as RawRule[]))
+      });
+
+      return { additionalPrivilege: { ...additionalPrivilege, permissions: data.permissions } };
+    }
+
+    if (!data.temporaryAccessStartTime || !data.temporaryRange) {
+      throw new BadRequestError({ message: "Temporary mode expects start time and range" });
+    }
+
+    const relativeTempAllocatedTimeInMs = ms(data.temporaryRange);
+    const additionalPrivilege = await additionalPrivilegeDAL.create({
+      membershipId,
+      name: data.name,
+      isTemporary: data.isTemporary,
+      permissions: data.permissions,
+      temporaryAccessEndTime: new Date(
+        new Date(data.temporaryAccessStartTime).getTime() + relativeTempAllocatedTimeInMs
+      ),
+      temporaryAccessStartTime: new Date(data.temporaryAccessStartTime),
+      temporaryMode: TemporaryPermissionMode.Relative,
+      temporaryRange: data.temporaryRange
+    });
+
+    return { additionalPrivilege: { ...additionalPrivilege, permissions: data.permissions } };
+  };
+
+  const updateAdditionalPrivilege = async (dto: TUpdateAdditionalPrivilegesDTO) => {
+    const { scopeData, data } = dto;
+    const factory = scopeFactory[scopeData.scope];
+    const { membershipId } = await factory.onUpdateAdditionalPrivilegesGuard(dto);
+
+    const existingPrivilege = await additionalPrivilegeDAL.findOne({
+      id: dto.selector.id,
+      membershipId
+    });
+    if (!existingPrivilege)
+      throw new NotFoundError({ message: `Additional privilege with name ${data.name} doesn't exist` });
+
+    validateHandlebarTemplate("Additional Privilege Create", JSON.stringify(data.permissions || []), {
+      allowedExpressions: (val) => val.includes("identity.")
+    });
+
+    const updatedData = { ...existingPrivilege, ...data };
+
+    if (!updatedData.isTemporary) {
+      const additionalPrivilege = await additionalPrivilegeDAL.updateById(existingPrivilege.id, {
+        name: updatedData.name,
+        isTemporary: data.isTemporary,
+        permissions: data.permissions ? JSON.stringify(packRules(data.permissions as RawRule[])) : undefined
+      });
+
+      return {
+        additionalPrivilege: { ...additionalPrivilege, permissions: unpackPermissions(additionalPrivilege.permissions) }
+      };
+    }
+
+    if (!updatedData.temporaryAccessStartTime || !updatedData.temporaryRange) {
+      throw new BadRequestError({ message: "Temporary mode expects start time and range" });
+    }
+
+    const relativeTempAllocatedTimeInMs = ms(updatedData.temporaryRange);
+    const additionalPrivilege = await additionalPrivilegeDAL.create({
+      membershipId,
+      name: updatedData.name,
+      isTemporary: updatedData.isTemporary,
+      permissions: updatedData.permissions,
+      temporaryAccessEndTime: new Date(
+        new Date(updatedData.temporaryAccessStartTime).getTime() + relativeTempAllocatedTimeInMs
+      ),
+      temporaryAccessStartTime: new Date(updatedData.temporaryAccessStartTime),
+      temporaryMode: TemporaryPermissionMode.Relative,
+      temporaryRange: updatedData.temporaryRange
+    });
+
+    return {
+      additionalPrivilege: { ...additionalPrivilege, permissions: unpackPermissions(additionalPrivilege.permissions) }
+    };
+  };
+
+  const deleteAdditionalPrivilege = async (dto: TDeleteAdditionalPrivilegesDTO) => {
+    const { scopeData, selector } = dto;
+    const factory = scopeFactory[scopeData.scope];
+    const { membershipId } = await factory.onDeleteAdditionalPrivilegesGuard(dto);
+
+    const existingPrivilege = await additionalPrivilegeDAL.findOne({
+      id: selector.id,
+      membershipId
+    });
+    if (!existingPrivilege)
+      throw new NotFoundError({ message: `Additional privilege with id ${selector.id} doesn't exist` });
+
+    const additionalPrivilege = await additionalPrivilegeDAL.deleteById(existingPrivilege.id);
+    return {
+      additionalPrivilege: { ...additionalPrivilege, permissions: unpackPermissions(additionalPrivilege.permissions) }
+    };
+  };
+
+  const getAdditionalPrivilegeById = async (dto: TGetAdditionalPrivilegesByIdDTO) => {
+    const { scopeData, selector } = dto;
+    const factory = scopeFactory[scopeData.scope];
+    const { membershipId } = await factory.onListAdditionalPrivilegesGuard(dto);
+    const additionalPrivilege = await additionalPrivilegeDAL.findOne({
+      id: selector.id,
+      membershipId
+    });
+    if (!additionalPrivilege)
+      throw new NotFoundError({ message: `Additional privilege with id ${selector.id} doesn't exist` });
+
+    return {
+      additionalPrivilege: { ...additionalPrivilege, permissions: unpackPermissions(additionalPrivilege.permissions) }
+    };
+  };
+
+  const listAdditionalPrivileges = async (dto: TListAdditionalPrivilegesDTO) => {
+    const { scopeData } = dto;
+    const factory = scopeFactory[scopeData.scope];
+    const { membershipId } = await factory.onListAdditionalPrivilegesGuard(dto);
+    const additionalPrivileges = await additionalPrivilegeDAL.find({
+      membershipId
+    });
+
+    return {
+      additionalPrivileges: additionalPrivileges.map((el) => ({
+        ...el,
+        permissions: unpackPermissions(el.permissions)
+      }))
+    };
+  };
+
+  return {
+    createAdditionalPrivilege,
+    updateAdditionalPrivilege,
+    deleteAdditionalPrivilege,
+    getAdditionalPrivilegeById,
+    listAdditionalPrivileges
+  };
+};
diff --git a/backend/src/services/additional-privilege/additional-privilege-types.ts b/backend/src/services/additional-privilege/additional-privilege-types.ts
new file mode 100644
index 000000000..7c708ba06
--- /dev/null
+++ b/backend/src/services/additional-privilege/additional-privilege-types.ts
@@ -0,0 +1,73 @@
+import { AccessScopeData, MembershipActors, TemporaryPermissionMode } from "@app/db/schemas";
+import { OrgServiceActor } from "@app/lib/types";
+
+export interface TAdditionalPrivilegesScopeFactory {
+  onCreateAdditionalPrivilegesGuard: (arg: TCreateAdditionalPrivilegesDTO) => Promise<{ membershipId: string }>;
+  onUpdateAdditionalPrivilegesGuard: (arg: TUpdateAdditionalPrivilegesDTO) => Promise<{ membershipId: string }>;
+  onDeleteAdditionalPrivilegesGuard: (arg: TDeleteAdditionalPrivilegesDTO) => Promise<{ membershipId: string }>;
+  onListAdditionalPrivilegesGuard: (arg: TListAdditionalPrivilegesDTO) => Promise<{ membershipId: string }>;
+  onGetAdditionalPrivilegesByIdGuard: (arg: TGetAdditionalPrivilegesByIdDTO) => Promise<{ membershipId: string }>;
+  getScopeField: (scope: AccessScopeData) => { key: "orgId" | "namespaceId" | "projectId"; value: string };
+}
+
+export type TCreateAdditionalPrivilegesDTO = {
+  permission: OrgServiceActor;
+  scopeData: AccessScopeData;
+  data: {
+    actorId: string;
+    actorType: MembershipActors;
+    name: string;
+    permissions: unknown;
+    isTemporary: boolean;
+    temporaryMode?: TemporaryPermissionMode.Relative;
+    temporaryRange?: string;
+    temporaryAccessStartTime?: string;
+  };
+};
+
+export type TUpdateAdditionalPrivilegesDTO = {
+  permission: OrgServiceActor;
+  scopeData: AccessScopeData;
+  selector: {
+    id: string;
+    actorId: string;
+    actorType: MembershipActors;
+  };
+  data: Partial<{
+    name: string;
+    permissions: unknown;
+    isTemporary: boolean;
+    temporaryMode?: TemporaryPermissionMode.Relative;
+    temporaryRange?: string;
+    temporaryAccessStartTime?: string;
+  }>;
+};
+
+export type TListAdditionalPrivilegesDTO = {
+  permission: OrgServiceActor;
+  scopeData: AccessScopeData;
+  selector: {
+    actorId: string;
+    actorType: MembershipActors;
+  };
+};
+
+export type TDeleteAdditionalPrivilegesDTO = {
+  permission: OrgServiceActor;
+  scopeData: AccessScopeData;
+  selector: {
+    id: string;
+    actorId: string;
+    actorType: MembershipActors;
+  };
+};
+
+export type TGetAdditionalPrivilegesByIdDTO = {
+  permission: OrgServiceActor;
+  scopeData: AccessScopeData;
+  selector: {
+    id: string;
+    actorId: string;
+    actorType: MembershipActors;
+  };
+};
diff --git a/backend/src/services/additional-privilege/namespace/namespace-additional-privilege-factory.ts b/backend/src/services/additional-privilege/namespace/namespace-additional-privilege-factory.ts
new file mode 100644
index 000000000..e2ccde286
--- /dev/null
+++ b/backend/src/services/additional-privilege/namespace/namespace-additional-privilege-factory.ts
@@ -0,0 +1,52 @@
+import { AccessScope } from "@app/db/schemas";
+import { InternalServerError } from "@app/lib/errors";
+
+import { TAdditionalPrivilegesScopeFactory } from "../additional-privilege-types";
+
+type TNamespaceAdditionalPrivilegesScopeFactoryDep = Record<string, never>;
+
+export const newNamespaceAdditionalPrivilegesFactory = (
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  deps: TNamespaceAdditionalPrivilegesScopeFactoryDep
+): TAdditionalPrivilegesScopeFactory => {
+  const getScopeField: TAdditionalPrivilegesScopeFactory["getScopeField"] = (dto) => {
+    if (dto.scope === AccessScope.Namespace) {
+      return { key: "namespaceId" as const, value: dto.namespaceId };
+    }
+    throw new InternalServerError({ message: "Invalid scope provided for the namespace factory" });
+  };
+
+  const onCreateAdditionalPrivilegesGuard: TAdditionalPrivilegesScopeFactory["onCreateAdditionalPrivilegesGuard"] =
+    async () => {
+      throw new InternalServerError({ message: "Namespace additional privileges create not implemented" });
+    };
+
+  const onUpdateAdditionalPrivilegesGuard: TAdditionalPrivilegesScopeFactory["onUpdateAdditionalPrivilegesGuard"] =
+    async () => {
+      throw new InternalServerError({ message: "Namespace additional privileges update not implemented" });
+    };
+
+  const onDeleteAdditionalPrivilegesGuard: TAdditionalPrivilegesScopeFactory["onDeleteAdditionalPrivilegesGuard"] =
+    async () => {
+      throw new InternalServerError({ message: "Namespace additional privileges delete not implemented" });
+    };
+
+  const onListAdditionalPrivilegesGuard: TAdditionalPrivilegesScopeFactory["onListAdditionalPrivilegesGuard"] =
+    async () => {
+      throw new InternalServerError({ message: "Namespace additional privileges list not implemented" });
+    };
+
+  const onGetAdditionalPrivilegesByIdGuard: TAdditionalPrivilegesScopeFactory["onGetAdditionalPrivilegesByIdGuard"] =
+    async () => {
+      throw new InternalServerError({ message: "Namespace additional privileges get by id not implemented" });
+    };
+
+  return {
+    onCreateAdditionalPrivilegesGuard,
+    onUpdateAdditionalPrivilegesGuard,
+    onDeleteAdditionalPrivilegesGuard,
+    onListAdditionalPrivilegesGuard,
+    onGetAdditionalPrivilegesByIdGuard,
+    getScopeField
+  };
+};
diff --git a/backend/src/services/additional-privilege/org/org-additional-privilege-factory.ts b/backend/src/services/additional-privilege/org/org-additional-privilege-factory.ts
new file mode 100644
index 000000000..cc1fbdd6c
--- /dev/null
+++ b/backend/src/services/additional-privilege/org/org-additional-privilege-factory.ts
@@ -0,0 +1,52 @@
+import { AccessScope } from "@app/db/schemas";
+import { InternalServerError } from "@app/lib/errors";
+
+import { TAdditionalPrivilegesScopeFactory } from "../additional-privilege-types";
+
+type TOrgAdditionalPrivilegesScopeFactoryDep = Record<string, never>;
+
+export const newOrgAdditionalPrivilegesFactory = (
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  deps: TOrgAdditionalPrivilegesScopeFactoryDep
+): TAdditionalPrivilegesScopeFactory => {
+  const getScopeField: TAdditionalPrivilegesScopeFactory["getScopeField"] = (dto) => {
+    if (dto.scope === AccessScope.Organization) {
+      return { key: "orgId" as const, value: dto.orgId };
+    }
+    throw new InternalServerError({ message: "Invalid scope provided for the org factory" });
+  };
+
+  const onCreateAdditionalPrivilegesGuard: TAdditionalPrivilegesScopeFactory["onCreateAdditionalPrivilegesGuard"] =
+    async () => {
+      throw new InternalServerError({ message: "Org additional privileges create not implemented" });
+    };
+
+  const onUpdateAdditionalPrivilegesGuard: TAdditionalPrivilegesScopeFactory["onUpdateAdditionalPrivilegesGuard"] =
+    async () => {
+      throw new InternalServerError({ message: "Org additional privileges update not implemented" });
+    };
+
+  const onDeleteAdditionalPrivilegesGuard: TAdditionalPrivilegesScopeFactory["onDeleteAdditionalPrivilegesGuard"] =
+    async () => {
+      throw new InternalServerError({ message: "Org additional privileges delete not implemented" });
+    };
+
+  const onListAdditionalPrivilegesGuard: TAdditionalPrivilegesScopeFactory["onListAdditionalPrivilegesGuard"] =
+    async () => {
+      throw new InternalServerError({ message: "Org additional privileges list not implemented" });
+    };
+
+  const onGetAdditionalPrivilegesByIdGuard: TAdditionalPrivilegesScopeFactory["onGetAdditionalPrivilegesByIdGuard"] =
+    async () => {
+      throw new InternalServerError({ message: "Org additional privileges get by id not implemented" });
+    };
+
+  return {
+    onCreateAdditionalPrivilegesGuard,
+    onUpdateAdditionalPrivilegesGuard,
+    onDeleteAdditionalPrivilegesGuard,
+    onListAdditionalPrivilegesGuard,
+    onGetAdditionalPrivilegesByIdGuard,
+    getScopeField
+  };
+};
diff --git a/backend/src/services/additional-privilege/project/project-additional-privilege-factory.ts b/backend/src/services/additional-privilege/project/project-additional-privilege-factory.ts
new file mode 100644
index 000000000..4956f7eac
--- /dev/null
+++ b/backend/src/services/additional-privilege/project/project-additional-privilege-factory.ts
@@ -0,0 +1,222 @@
+import { ForbiddenError } from "@casl/ability";
+
+import { AccessScope, ActionProjectType, MembershipActors } from "@app/db/schemas";
+import {
+  constructPermissionErrorMessage,
+  validatePrivilegeChangeOperation
+} from "@app/ee/services/permission/permission-fns";
+import { TPermissionServiceFactory } from "@app/ee/services/permission/permission-service-types";
+import {
+  ProjectPermissionIdentityActions,
+  ProjectPermissionMemberActions,
+  ProjectPermissionSub
+} from "@app/ee/services/permission/project-permission";
+import { BadRequestError, InternalServerError, PermissionBoundaryError } from "@app/lib/errors";
+import { OrgServiceActor } from "@app/lib/types";
+import { ActorType } from "@app/services/auth/auth-type";
+import { TMembershipDALFactory } from "@app/services/membership/membership-dal";
+import { TOrgDALFactory } from "@app/services/org/org-dal";
+
+import { TAdditionalPrivilegesScopeFactory } from "../additional-privilege-types";
+
+type TProjectAdditionalPrivilegesScopeFactoryDep = {
+  permissionService: Pick<TPermissionServiceFactory, "getProjectPermission">;
+  orgDAL: Pick<TOrgDALFactory, "findById">;
+  membershipDAL: Pick<TMembershipDALFactory, "findOne">;
+};
+
+export const newProjectAdditionalPrivilegesFactory = ({
+  permissionService,
+  orgDAL,
+  membershipDAL
+}: TProjectAdditionalPrivilegesScopeFactoryDep): TAdditionalPrivilegesScopeFactory => {
+  const $getPermission = (permission: OrgServiceActor, projectId: string) => {
+    return permissionService.getProjectPermission({
+      actor: permission.type,
+      actorId: permission.id,
+      actionProjectType: ActionProjectType.Any,
+      actorAuthMethod: permission.authMethod,
+      projectId,
+      actorOrgId: permission.orgId
+    });
+  };
+
+  const $getActorType = (type: MembershipActors) => {
+    if (type === MembershipActors.Group)
+      throw new InternalServerError({ message: "Group additional privilege not implemented for projects" });
+
+    if (type === MembershipActors.Identity) return ActorType.IDENTITY;
+    if (type === MembershipActors.User) return ActorType.USER;
+
+    throw new InternalServerError({ message: `Group additional privilege not implemented for actor: ${String(type)}` });
+  };
+
+  const getScopeField: TAdditionalPrivilegesScopeFactory["getScopeField"] = (dto) => {
+    if (dto.scope === AccessScope.Project) {
+      return { key: "projectId" as const, value: dto.projectId };
+    }
+    throw new BadRequestError({ message: "Invalid scope provided for the factory" });
+  };
+
+  const onCreateAdditionalPrivilegesGuard: TAdditionalPrivilegesScopeFactory["onCreateAdditionalPrivilegesGuard"] =
+    async (dto) => {
+      const scope = getScopeField(dto.scopeData);
+      const actorType = $getActorType(dto.data.actorType);
+
+      const { permission } = await $getPermission(dto.permission, scope.value);
+      ForbiddenError.from(permission).throwUnlessCan(ProjectPermissionMemberActions.Edit, ProjectPermissionSub.Member);
+
+      const { shouldUseNewPrivilegeSystem } = await orgDAL.findById(dto.permission.orgId);
+      const { permission: targetUserPermission, memberships } = await $getPermission(
+        { ...dto.permission, type: actorType, id: dto.data.actorId },
+        scope.value
+      );
+
+      const permissionAction =
+        actorType === ActorType.USER
+          ? ProjectPermissionMemberActions.GrantPrivileges
+          : ProjectPermissionIdentityActions.GrantPrivileges;
+      const permissionSubject =
+        actorType === ActorType.USER ? ProjectPermissionSub.Member : ProjectPermissionSub.Identity;
+      const permissionBoundary = validatePrivilegeChangeOperation(
+        shouldUseNewPrivilegeSystem,
+        permissionAction,
+        permissionSubject,
+        permission,
+        targetUserPermission
+      );
+      if (!permissionBoundary.isValid)
+        throw new PermissionBoundaryError({
+          message: constructPermissionErrorMessage(
+            "Failed to update more privileged actor",
+            shouldUseNewPrivilegeSystem,
+            permissionAction,
+            permissionSubject
+          ),
+          details: { missingPermissions: permissionBoundary.missingPermissions }
+        });
+
+      const membership = memberships.find(
+        (el) => el[actorType === ActorType.IDENTITY ? "actorIdentityId" : "actorUserId"] === dto.data.actorId
+      );
+      if (!membership) throw new BadRequestError({ message: "Actor doesn't have membership" });
+      return { membershipId: membership.id };
+    };
+
+  const onUpdateAdditionalPrivilegesGuard: TAdditionalPrivilegesScopeFactory["onUpdateAdditionalPrivilegesGuard"] =
+    async (dto) => {
+      const scope = getScopeField(dto.scopeData);
+      const actorType = $getActorType(dto.selector.actorType);
+
+      const { permission } = await $getPermission(dto.permission, scope.value);
+      ForbiddenError.from(permission).throwUnlessCan(ProjectPermissionMemberActions.Edit, ProjectPermissionSub.Member);
+
+      const { shouldUseNewPrivilegeSystem } = await orgDAL.findById(dto.permission.orgId);
+      const { permission: targetUserPermission, memberships } = await $getPermission(
+        { ...dto.permission, type: actorType, id: dto.selector.actorId },
+        scope.value
+      );
+
+      const permissionAction =
+        actorType === ActorType.USER
+          ? ProjectPermissionMemberActions.GrantPrivileges
+          : ProjectPermissionIdentityActions.GrantPrivileges;
+      const permissionSubject =
+        actorType === ActorType.USER ? ProjectPermissionSub.Member : ProjectPermissionSub.Identity;
+      const permissionBoundary = validatePrivilegeChangeOperation(
+        shouldUseNewPrivilegeSystem,
+        permissionAction,
+        permissionSubject,
+        permission,
+        targetUserPermission
+      );
+      if (!permissionBoundary.isValid)
+        throw new PermissionBoundaryError({
+          message: constructPermissionErrorMessage(
+            "Failed to update more privileged actor",
+            shouldUseNewPrivilegeSystem,
+            permissionAction,
+            permissionSubject
+          ),
+          details: { missingPermissions: permissionBoundary.missingPermissions }
+        });
+
+      const membership = memberships.find(
+        (el) => el[actorType === ActorType.IDENTITY ? "actorIdentityId" : "actorUserId"] === dto.selector.actorId
+      );
+      if (!membership) throw new BadRequestError({ message: "Actor doesn't have membership" });
+      return { membershipId: membership.id };
+    };
+
+  const onDeleteAdditionalPrivilegesGuard: TAdditionalPrivilegesScopeFactory["onDeleteAdditionalPrivilegesGuard"] =
+    async (dto) => {
+      const scope = getScopeField(dto.scopeData);
+      const actorType = $getActorType(dto.selector.actorType);
+
+      const { permission } = await $getPermission(dto.permission, scope.value);
+      ForbiddenError.from(permission).throwUnlessCan(ProjectPermissionMemberActions.Edit, ProjectPermissionSub.Member);
+
+      const membership = await membershipDAL.findOne({
+        scopeOrgId: dto.permission.orgId,
+        scopeProjectId: scope.value,
+        [actorType === ActorType.USER ? "actorUserId" : "actorIdentityId"]: dto.selector.actorId
+      });
+
+      if (!membership) throw new BadRequestError({ message: "Actor doesn't have membership" });
+      return { membershipId: membership.id };
+    };
+
+  const onListAdditionalPrivilegesGuard: TAdditionalPrivilegesScopeFactory["onListAdditionalPrivilegesGuard"] = async (
+    dto
+  ) => {
+    const scope = getScopeField(dto.scopeData);
+    const actorType = $getActorType(dto.selector.actorType);
+
+    const permissionSet =
+      actorType === ActorType.USER
+        ? ([ProjectPermissionMemberActions.Read, ProjectPermissionSub.Member] as const)
+        : ([ProjectPermissionIdentityActions.Read, ProjectPermissionSub.Identity] as const);
+    const { permission } = await $getPermission(dto.permission, scope.value);
+    ForbiddenError.from(permission).throwUnlessCan(...permissionSet);
+
+    const membership = await membershipDAL.findOne({
+      scopeOrgId: dto.permission.orgId,
+      scopeProjectId: scope.value,
+      [actorType === ActorType.USER ? "actorUserId" : "actorIdentityId"]: dto.selector.actorId
+    });
+
+    if (!membership) throw new BadRequestError({ message: "Actor doesn't have membership" });
+    return { membershipId: membership.id };
+  };
+
+  const onGetAdditionalPrivilegesByIdGuard: TAdditionalPrivilegesScopeFactory["onGetAdditionalPrivilegesByIdGuard"] =
+    async (dto) => {
+      const scope = getScopeField(dto.scopeData);
+      const actorType = $getActorType(dto.selector.actorType);
+
+      const permissionSet =
+        actorType === ActorType.USER
+          ? ([ProjectPermissionMemberActions.Read, ProjectPermissionSub.Member] as const)
+          : ([ProjectPermissionIdentityActions.Read, ProjectPermissionSub.Identity] as const);
+      const { permission } = await $getPermission(dto.permission, scope.value);
+      ForbiddenError.from(permission).throwUnlessCan(...permissionSet);
+
+      const membership = await membershipDAL.findOne({
+        scopeOrgId: dto.permission.orgId,
+        scopeProjectId: scope.value,
+        [actorType === ActorType.USER ? "actorUserId" : "actorIdentityId"]: dto.selector.actorId
+      });
+
+      if (!membership) throw new BadRequestError({ message: "Actor doesn't have membership" });
+      return { membershipId: membership.id };
+    };
+
+  return {
+    onCreateAdditionalPrivilegesGuard,
+    onUpdateAdditionalPrivilegesGuard,
+    onDeleteAdditionalPrivilegesGuard,
+    onListAdditionalPrivilegesGuard,
+    onGetAdditionalPrivilegesByIdGuard,
+    getScopeField
+  };
+};
diff --git a/backend/src/services/membership/membership-dal.ts b/backend/src/services/membership/membership-dal.ts
new file mode 100644
index 000000000..03ee6af92
--- /dev/null
+++ b/backend/src/services/membership/membership-dal.ts
@@ -0,0 +1,10 @@
+import { TDbClient } from "@app/db";
+import { TableName } from "@app/db/schemas";
+import { ormify } from "@app/lib/knex";
+
+export type TMembershipDALFactory = ReturnType<typeof membershipDALFactory>;
+
+export const membershipDALFactory = (db: TDbClient) => {
+  const orm = ormify(db, TableName.Membership);
+  return orm;
+};
diff --git a/backend/src/services/membership/membership-service.ts b/backend/src/services/membership/membership-service.ts
new file mode 100644
index 000000000..c9dc34081
--- /dev/null
+++ b/backend/src/services/membership/membership-service.ts
@@ -0,0 +1,11 @@
+import { TMembershipDALFactory } from "./membership-dal";
+
+type TMembershipServiceFactoryDep = {
+  membershipDAL: TMembershipDALFactory;
+};
+
+export type TMembershipServiceFactory = ReturnType<typeof membershipServiceFactory>;
+
+export const membershipServiceFactory = ({ membershipDAL }: TMembershipServiceFactoryDep) => {
+  return {};
+};
diff --git a/backend/src/services/membership/membership-types.ts b/backend/src/services/membership/membership-types.ts
new file mode 100644
index 000000000..e69de29bb
diff --git a/backend/src/services/role/role-service.ts b/backend/src/services/role/role-service.ts
index 3611749e7..f9a066cb0 100644
--- a/backend/src/services/role/role-service.ts
+++ b/backend/src/services/role/role-service.ts
@@ -44,11 +44,17 @@ export const roleServiceFactory = ({ roleDAL, permissionService }: TRoleServiceF
     const factory = scopeFactory[scopeData.scope];
     await factory.onCreateRoleGuard(dto);
 
+    const scope = factory.getScopeField(scopeData);
+    const existingRole = await roleDAL.findOne({
+      slug: data.slug,
+      [scope.key]: scope.value
+    });
+    if (existingRole) throw new NotFoundError({ message: `Role with ${data.slug} exist` });
+
     validateHandlebarTemplate("Role Creation", JSON.stringify(data.permissions || []), {
       allowedExpressions: (val) => val.includes("identity.")
     });
 
-    const scope = factory.getScopeField(scopeData);
     const role = await roleDAL.create({
       name: data.name,
       description: data.description,