diff --git a/.changeset/ten-spoons-help.md b/.changeset/ten-spoons-help.md
new file mode 100644
index 0000000000..5089154424
--- /dev/null
+++ b/.changeset/ten-spoons-help.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-tech-insights-node': minor
+---
+
+**BREAKING**: The `FactRetrieverContext` type now contains an additional `auth` field.
diff --git a/.changeset/thick-pillows-develop.md b/.changeset/thick-pillows-develop.md
new file mode 100644
index 0000000000..9be71da55d
--- /dev/null
+++ b/.changeset/thick-pillows-develop.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-tech-insights-backend': patch
+---
+
+Added support for the new `AuthService`.
diff --git a/plugins/tech-insights-backend/api-report.md b/plugins/tech-insights-backend/api-report.md
index 631e792141..c2121bf655 100644
--- a/plugins/tech-insights-backend/api-report.md
+++ b/plugins/tech-insights-backend/api-report.md
@@ -3,6 +3,7 @@
 > Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
 
 ```ts
+import { AuthService } from '@backstage/backend-plugin-api';
 import { BackendFeature } from '@backstage/backend-plugin-api';
 import { CheckResult } from '@backstage/plugin-tech-insights-common';
 import { Config } from '@backstage/config';
@@ -110,6 +111,8 @@ export interface TechInsightsOptions<
   CheckType extends TechInsightCheck,
   CheckResultType extends CheckResult,
 > {
+  // (undocumented)
+  auth?: AuthService;
   // (undocumented)
   config: Config;
   // (undocumented)
diff --git a/plugins/tech-insights-backend/src/plugin/plugin.ts b/plugins/tech-insights-backend/src/plugin/plugin.ts
index 6da1ac1637..e97a0c98d8 100644
--- a/plugins/tech-insights-backend/src/plugin/plugin.ts
+++ b/plugins/tech-insights-backend/src/plugin/plugin.ts
@@ -102,6 +102,7 @@ export const techInsightsPlugin = createBackendPlugin({
         logger: coreServices.logger,
         scheduler: coreServices.scheduler,
         tokenManager: coreServices.tokenManager,
+        auth: coreServices.auth,
       },
       async init({
         config,
@@ -111,6 +112,7 @@ export const techInsightsPlugin = createBackendPlugin({
         logger,
         scheduler,
         tokenManager,
+        auth,
       }) {
         const winstonLogger = loggerToWinstonLogger(logger);
         const factRetrievers: FactRetrieverRegistration[] = Object.entries(
@@ -136,6 +138,7 @@ export const techInsightsPlugin = createBackendPlugin({
           persistenceContext,
           scheduler,
           tokenManager,
+          auth,
         });
 
         httpRouter.use(
diff --git a/plugins/tech-insights-backend/src/service/fact/FactRetrieverEngine.test.ts b/plugins/tech-insights-backend/src/service/fact/FactRetrieverEngine.test.ts
index 3bbaf9edf5..a6d485d130 100644
--- a/plugins/tech-insights-backend/src/service/fact/FactRetrieverEngine.test.ts
+++ b/plugins/tech-insights-backend/src/service/fact/FactRetrieverEngine.test.ts
@@ -32,7 +32,11 @@ import {
   ServerTokenManager,
 } from '@backstage/backend-common';
 import { ConfigReader } from '@backstage/config';
-import { TestDatabaseId, TestDatabases } from '@backstage/backend-test-utils';
+import {
+  TestDatabaseId,
+  TestDatabases,
+  mockServices,
+} from '@backstage/backend-test-utils';
 import { TaskScheduler } from '@backstage/backend-tasks';
 
 jest.setTimeout(60_000);
@@ -140,6 +144,7 @@ describe('FactRetrieverEngine', () => {
         logger: getVoidLogger(),
         config: ConfigReader.fromConfigs([]),
         tokenManager: ServerTokenManager.noop(),
+        auth: mockServices.auth(),
         discovery: {
           getBaseUrl: (_: string) => Promise.resolve('http://mock.url'),
           getExternalBaseUrl: (_: string) => Promise.resolve('http://mock.url'),
diff --git a/plugins/tech-insights-backend/src/service/fact/factRetrievers/entityMetadataFactRetriever.test.ts b/plugins/tech-insights-backend/src/service/fact/factRetrievers/entityMetadataFactRetriever.test.ts
index 31400788b5..7c608f60bc 100644
--- a/plugins/tech-insights-backend/src/service/fact/factRetrievers/entityMetadataFactRetriever.test.ts
+++ b/plugins/tech-insights-backend/src/service/fact/factRetrievers/entityMetadataFactRetriever.test.ts
@@ -23,6 +23,7 @@ import {
 import { ConfigReader } from '@backstage/config';
 import { GetEntitiesResponse } from '@backstage/catalog-client';
 import { entityMetadataFactRetriever } from './entityMetadataFactRetriever';
+import { mockServices } from '@backstage/backend-test-utils';
 
 const getEntitiesMock = jest.fn();
 jest.mock('@backstage/catalog-client', () => {
@@ -104,6 +105,7 @@ const defaultEntityListResponse: GetEntitiesResponse = {
 const handlerContext = {
   discovery,
   logger: getVoidLogger(),
+  auth: mockServices.auth(),
   config: ConfigReader.fromConfigs([]),
   tokenManager: ServerTokenManager.noop(),
 };
diff --git a/plugins/tech-insights-backend/src/service/fact/factRetrievers/entityMetadataFactRetriever.ts b/plugins/tech-insights-backend/src/service/fact/factRetrievers/entityMetadataFactRetriever.ts
index 3103f9bdd5..cca4911350 100644
--- a/plugins/tech-insights-backend/src/service/fact/factRetrievers/entityMetadataFactRetriever.ts
+++ b/plugins/tech-insights-backend/src/service/fact/factRetrievers/entityMetadataFactRetriever.ts
@@ -47,12 +47,11 @@ export const entityMetadataFactRetriever: FactRetriever = {
       description: 'The entity has tags in metadata',
     },
   },
-  handler: async ({
-    discovery,
-    entityFilter,
-    tokenManager,
-  }: FactRetrieverContext) => {
-    const { token } = await tokenManager.getToken();
+  handler: async ({ discovery, entityFilter, auth }: FactRetrieverContext) => {
+    const { token } = await auth.getPluginRequestToken({
+      onBehalfOf: await auth.getOwnServiceCredentials(),
+      targetPluginId: 'catalog',
+    });
     const catalogClient = new CatalogClient({
       discoveryApi: discovery,
     });
diff --git a/plugins/tech-insights-backend/src/service/fact/factRetrievers/entityOwnershipFactRetriever.test.ts b/plugins/tech-insights-backend/src/service/fact/factRetrievers/entityOwnershipFactRetriever.test.ts
index 7a77ef91c4..1c578486ce 100644
--- a/plugins/tech-insights-backend/src/service/fact/factRetrievers/entityOwnershipFactRetriever.test.ts
+++ b/plugins/tech-insights-backend/src/service/fact/factRetrievers/entityOwnershipFactRetriever.test.ts
@@ -23,6 +23,7 @@ import {
 } from '@backstage/backend-common';
 import { ConfigReader } from '@backstage/config';
 import { GetEntitiesResponse } from '@backstage/catalog-client';
+import { mockServices } from '@backstage/backend-test-utils';
 
 const getEntitiesMock = jest.fn();
 jest.mock('@backstage/catalog-client', () => {
@@ -104,6 +105,7 @@ const defaultEntityListResponse: GetEntitiesResponse = {
 const handlerContext = {
   discovery,
   logger: getVoidLogger(),
+  auth: mockServices.auth(),
   config: ConfigReader.fromConfigs([]),
   tokenManager: ServerTokenManager.noop(),
 };
diff --git a/plugins/tech-insights-backend/src/service/fact/factRetrievers/entityOwnershipFactRetriever.ts b/plugins/tech-insights-backend/src/service/fact/factRetrievers/entityOwnershipFactRetriever.ts
index 974f1d30cd..367bf42c09 100644
--- a/plugins/tech-insights-backend/src/service/fact/factRetrievers/entityOwnershipFactRetriever.ts
+++ b/plugins/tech-insights-backend/src/service/fact/factRetrievers/entityOwnershipFactRetriever.ts
@@ -45,12 +45,11 @@ export const entityOwnershipFactRetriever: FactRetriever = {
       description: 'The spec.owner field is set and refers to a group',
     },
   },
-  handler: async ({
-    discovery,
-    entityFilter,
-    tokenManager,
-  }: FactRetrieverContext) => {
-    const { token } = await tokenManager.getToken();
+  handler: async ({ discovery, entityFilter, auth }: FactRetrieverContext) => {
+    const { token } = await auth.getPluginRequestToken({
+      onBehalfOf: await auth.getOwnServiceCredentials(),
+      targetPluginId: 'catalog',
+    });
     const catalogClient = new CatalogClient({
       discoveryApi: discovery,
     });
diff --git a/plugins/tech-insights-backend/src/service/fact/factRetrievers/techdocsFactRetriever.test.ts b/plugins/tech-insights-backend/src/service/fact/factRetrievers/techdocsFactRetriever.test.ts
index 0c70f6c9f1..37f82cb4dd 100644
--- a/plugins/tech-insights-backend/src/service/fact/factRetrievers/techdocsFactRetriever.test.ts
+++ b/plugins/tech-insights-backend/src/service/fact/factRetrievers/techdocsFactRetriever.test.ts
@@ -23,6 +23,7 @@ import {
 } from '@backstage/backend-common';
 import { ConfigReader } from '@backstage/config';
 import { GetEntitiesResponse } from '@backstage/catalog-client';
+import { mockServices } from '@backstage/backend-test-utils';
 
 const getEntitiesMock = jest.fn();
 jest.mock('@backstage/catalog-client', () => {
@@ -104,6 +105,7 @@ const defaultEntityListResponse: GetEntitiesResponse = {
 const handlerContext = {
   discovery,
   logger: getVoidLogger(),
+  auth: mockServices.auth(),
   config: ConfigReader.fromConfigs([]),
   tokenManager: ServerTokenManager.noop(),
 };
diff --git a/plugins/tech-insights-backend/src/service/fact/factRetrievers/techdocsFactRetriever.ts b/plugins/tech-insights-backend/src/service/fact/factRetrievers/techdocsFactRetriever.ts
index bd07bb3ecc..24f2fc4d6f 100644
--- a/plugins/tech-insights-backend/src/service/fact/factRetrievers/techdocsFactRetriever.ts
+++ b/plugins/tech-insights-backend/src/service/fact/factRetrievers/techdocsFactRetriever.ts
@@ -43,12 +43,11 @@ export const techdocsFactRetriever: FactRetriever = {
       description: 'The entity has a TechDocs reference annotation',
     },
   },
-  handler: async ({
-    discovery,
-    entityFilter,
-    tokenManager,
-  }: FactRetrieverContext) => {
-    const { token } = await tokenManager.getToken();
+  handler: async ({ discovery, entityFilter, auth }: FactRetrieverContext) => {
+    const { token } = await auth.getPluginRequestToken({
+      onBehalfOf: await auth.getOwnServiceCredentials(),
+      targetPluginId: 'catalog',
+    });
     const catalogClient = new CatalogClient({
       discoveryApi: discovery,
     });
diff --git a/plugins/tech-insights-backend/src/service/techInsightsContextBuilder.ts b/plugins/tech-insights-backend/src/service/techInsightsContextBuilder.ts
index 4f49e0031b..7b6f04b183 100644
--- a/plugins/tech-insights-backend/src/service/techInsightsContextBuilder.ts
+++ b/plugins/tech-insights-backend/src/service/techInsightsContextBuilder.ts
@@ -25,6 +25,7 @@ import {
   PluginDatabaseManager,
   PluginEndpointDiscovery,
   TokenManager,
+  createLegacyAuthAdapters,
 } from '@backstage/backend-common';
 import {
   FactChecker,
@@ -37,6 +38,7 @@ import {
 import { initializePersistenceContext } from './persistence';
 import { CheckResult } from '@backstage/plugin-tech-insights-common';
 import { PluginTaskScheduler } from '@backstage/backend-tasks';
+import { AuthService } from '@backstage/backend-plugin-api';
 
 /**
  * @public
@@ -82,6 +84,7 @@ export interface TechInsightsOptions<
   database: PluginDatabaseManager;
   scheduler: PluginTaskScheduler;
   tokenManager: TokenManager;
+  auth?: AuthService;
 }
 
 /**
@@ -147,6 +150,12 @@ export const buildTechInsightsContext = async <
       logger,
     }));
 
+  const { auth } = createLegacyAuthAdapters({
+    auth: options.auth,
+    tokenManager,
+    discovery,
+  });
+
   const factRetrieverEngine = await DefaultFactRetrieverEngine.create({
     scheduler,
     repository: persistenceContext.techInsightsStore,
@@ -156,6 +165,7 @@ export const buildTechInsightsContext = async <
       discovery,
       logger,
       tokenManager,
+      auth,
     },
   });
 
diff --git a/plugins/tech-insights-node/api-report.md b/plugins/tech-insights-node/api-report.md
index 13056b5eaa..bf4ee10dea 100644
--- a/plugins/tech-insights-node/api-report.md
+++ b/plugins/tech-insights-node/api-report.md
@@ -3,6 +3,7 @@
 > Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
 
 ```ts
+import { AuthService } from '@backstage/backend-plugin-api';
 import { CheckResult } from '@backstage/plugin-tech-insights-common';
 import { Config } from '@backstage/config';
 import { DateTime } from 'luxon';
@@ -66,6 +67,7 @@ export type FactRetrieverContext = {
   discovery: PluginEndpointDiscovery;
   logger: Logger;
   tokenManager: TokenManager;
+  auth: AuthService;
   entityFilter?:
     | Record<string, string | symbol | (string | symbol)[]>[]
     | Record<string, string | symbol | (string | symbol)[]>;
diff --git a/plugins/tech-insights-node/src/facts.ts b/plugins/tech-insights-node/src/facts.ts
index 9257ea789e..6d40bf615d 100644
--- a/plugins/tech-insights-node/src/facts.ts
+++ b/plugins/tech-insights-node/src/facts.ts
@@ -22,6 +22,7 @@ import {
 } from '@backstage/backend-common';
 import { FactSchema } from '@backstage/plugin-tech-insights-common';
 import { Logger } from 'winston';
+import { AuthService } from '@backstage/backend-plugin-api';
 
 /**
  * A container for facts. The shape of the fact records needs to correspond to the FactSchema with same `ref` value.
@@ -92,6 +93,7 @@ export type FactRetrieverContext = {
   discovery: PluginEndpointDiscovery;
   logger: Logger;
   tokenManager: TokenManager;
+  auth: AuthService;
   entityFilter?:
     | Record<string, string | symbol | (string | symbol)[]>[]
     | Record<string, string | symbol | (string | symbol)[]>;