diff --git a/backend/src/ee/services/audit-log/audit-log-types.ts b/backend/src/ee/services/audit-log/audit-log-types.ts
index f91692a14..de3ce9af6 100644
--- a/backend/src/ee/services/audit-log/audit-log-types.ts
+++ b/backend/src/ee/services/audit-log/audit-log-types.ts
@@ -365,6 +365,8 @@ export enum EventType {
   LOAD_PROJECT_KMS_BACKUP = "load-project-kms-backup",
   ORG_ADMIN_ACCESS_PROJECT = "org-admin-accessed-project",
   ORG_ADMIN_BYPASS_SSO = "org-admin-bypassed-sso",
+  USER_LOGIN = "user-login",
+  SELECT_ORGANIZATION = "select-organization",
   CREATE_CERTIFICATE_TEMPLATE = "create-certificate-template",
   UPDATE_CERTIFICATE_TEMPLATE = "update-certificate-template",
   DELETE_CERTIFICATE_TEMPLATE = "delete-certificate-template",
@@ -570,6 +572,7 @@ interface UserActorMetadata {
   email?: string | null;
   username: string;
   permission?: Record<string, unknown>;
+  authMethod?: string;
 }
 
 interface ServiceActorMetadata {
@@ -2657,6 +2660,22 @@ interface OrgAdminBypassSSOEvent {
   metadata: Record<string, string>; // no metadata yet
 }
 
+interface UserLoginEvent {
+  type: EventType.USER_LOGIN;
+  metadata: {
+    organizationId?: string;
+    authProvider?: string;
+  };
+}
+
+interface SelectOrganizationEvent {
+  type: EventType.SELECT_ORGANIZATION;
+  metadata: {
+    organizationId: string;
+    organizationName: string;
+  };
+}
+
 interface CreateCertificateTemplateEstConfig {
   type: EventType.CREATE_CERTIFICATE_TEMPLATE_EST_CONFIG;
   metadata: {
@@ -4535,4 +4554,6 @@ export type Event =
   | UpdateCertificateRenewalConfigEvent
   | DisableCertificateRenewalConfigEvent
   | AutomatedRenewCertificate
-  | AutomatedRenewCertificateFailed;
+  | AutomatedRenewCertificateFailed
+  | UserLoginEvent
+  | SelectOrganizationEvent;
diff --git a/backend/src/services/auth/auth-login-service.ts b/backend/src/services/auth/auth-login-service.ts
index b9c759703..e2f0f5f16 100644
--- a/backend/src/services/auth/auth-login-service.ts
+++ b/backend/src/services/auth/auth-login-service.ts
@@ -454,6 +454,30 @@ export const authLoginServiceFactory = ({
         });
       }
 
+      if (organizationId) {
+        await auditLogService.createAuditLog({
+          orgId: organizationId,
+          ipAddress: ip,
+          userAgent,
+          userAgentType: getUserAgentType(userAgent),
+          actor: {
+            type: ActorType.USER,
+            metadata: {
+              email: userEnc.email,
+              userId: userEnc.userId,
+              username: userEnc.username,
+              authMethod
+            }
+          },
+          event: {
+            type: EventType.USER_LOGIN,
+            metadata: {
+              organizationId
+            }
+          }
+        });
+      }
+
       return {
         tokens: {
           accessToken: token.access,
@@ -646,6 +670,29 @@ export const authLoginServiceFactory = ({
       }
     }
 
+    await auditLogService.createAuditLog({
+      orgId: organizationId,
+      ipAddress,
+      userAgent,
+      userAgentType: getUserAgentType(userAgent),
+      actor: {
+        type: ActorType.USER,
+        metadata: {
+          email: user.email,
+          userId: user.id,
+          username: user.username,
+          authMethod: decodedToken.authMethod
+        }
+      },
+      event: {
+        type: EventType.SELECT_ORGANIZATION,
+        metadata: {
+          organizationId,
+          organizationName: selectedOrg.name
+        }
+      }
+    });
+
     return {
       ...tokens,
       user,
@@ -1039,6 +1086,33 @@ export const authLoginServiceFactory = ({
       organizationId
     });
 
+    if (organizationId) {
+      await auditLogService.createAuditLog({
+        orgId: organizationId,
+        ipAddress: ip,
+        userAgent,
+        userAgentType: getUserAgentType(userAgent),
+        actor: {
+          type: ActorType.USER,
+          metadata: {
+            email: userEnc.email,
+            userId: userEnc.userId,
+            username: userEnc.username,
+            authMethod: decodedProviderToken.authMethod
+          }
+        },
+        event: {
+          type: EventType.USER_LOGIN,
+          metadata: {
+            organizationId,
+            ...(isAuthMethodSaml(decodedProviderToken.authMethod) && {
+              authProvider: decodedProviderToken.authMethod
+            })
+          }
+        }
+      });
+    }
+
     return { token, isMfaEnabled: false, user: userEnc, decodedProviderToken } as const;
   };