diff --git a/.changeset/beige-pandas-thank.md b/.changeset/beige-pandas-thank.md
new file mode 100644
index 0000000000..b2c52842fc
--- /dev/null
+++ b/.changeset/beige-pandas-thank.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-auth-backend': patch
+---
+
+Add OneLogin Identity Provider to Auth Backend
diff --git a/app-config.yaml b/app-config.yaml
index 4746e822da..a495df0263 100644
--- a/app-config.yaml
+++ b/app-config.yaml
@@ -232,6 +232,14 @@ auth:
           $env: AUTH_MICROSOFT_CLIENT_SECRET
         tenantId:
           $env: AUTH_MICROSOFT_TENANT_ID
+    onelogin:
+      development:
+        clientId:
+          $env: AUTH_ONELOGIN_CLIENT_ID
+        clientSecret:
+          $env: AUTH_ONELOGIN_CLIENT_SECRET
+        issuer:
+          $env: AUTH_ONELOGIN_ISSUER
 costInsights:
   engineerCost: 200000
   products:
diff --git a/packages/app/src/identityProviders.ts b/packages/app/src/identityProviders.ts
index 388bc8d8b6..06ff6b07d3 100644
--- a/packages/app/src/identityProviders.ts
+++ b/packages/app/src/identityProviders.ts
@@ -21,6 +21,7 @@ import {
   githubAuthApiRef,
   samlAuthApiRef,
   microsoftAuthApiRef,
+  oneloginAuthApiRef,
 } from '@backstage/core';
 
 export const providers = [
@@ -60,4 +61,10 @@ export const providers = [
     message: 'Sign In using SAML',
     apiRef: samlAuthApiRef,
   },
+  {
+    id: 'onelogin-auth-provider',
+    title: 'OneLogin',
+    message: 'Sign In using OneLogin',
+    apiRef: oneloginAuthApiRef,
+  },
 ];
diff --git a/packages/core-api/src/apis/definitions/auth.ts b/packages/core-api/src/apis/definitions/auth.ts
index 946baeabd9..c538065f3a 100644
--- a/packages/core-api/src/apis/definitions/auth.ts
+++ b/packages/core-api/src/apis/definitions/auth.ts
@@ -320,3 +320,14 @@ export const samlAuthApiRef: ApiRef<
   id: 'core.auth.saml',
   description: 'Example of how to use SAML custom provider',
 });
+
+export const oneloginAuthApiRef: ApiRef<
+  OAuthApi &
+    OpenIdConnectApi &
+    ProfileInfoApi &
+    BackstageIdentityApi &
+    SessionApi
+> = createApiRef({
+  id: 'core.auth.onelogin',
+  description: 'Provides authentication towards OneLogin APIs and identities',
+});
diff --git a/packages/core-api/src/apis/implementations/auth/index.ts b/packages/core-api/src/apis/implementations/auth/index.ts
index 39223e8e15..7ef78d19cf 100644
--- a/packages/core-api/src/apis/implementations/auth/index.ts
+++ b/packages/core-api/src/apis/implementations/auth/index.ts
@@ -22,3 +22,4 @@ export * from './okta';
 export * from './saml';
 export * from './auth0';
 export * from './microsoft';
+export * from './onelogin';
diff --git a/packages/core-api/src/apis/implementations/auth/onelogin/OneLoginAuth.ts b/packages/core-api/src/apis/implementations/auth/onelogin/OneLoginAuth.ts
new file mode 100644
index 0000000000..ff5c7c1990
--- /dev/null
+++ b/packages/core-api/src/apis/implementations/auth/onelogin/OneLoginAuth.ts
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import OneLoginIcon from '@material-ui/icons/AcUnit';
+import { oneloginAuthApiRef } from '../../../definitions/auth';
+import {
+  OAuthRequestApi,
+  AuthProvider,
+  DiscoveryApi,
+} from '../../../definitions';
+import { OAuth2 } from '../oauth2';
+
+type CreateOptions = {
+  discoveryApi: DiscoveryApi;
+  oauthRequestApi: OAuthRequestApi;
+
+  environment?: string;
+  provider?: AuthProvider & { id: string };
+};
+
+const DEFAULT_PROVIDER = {
+  id: 'onelogin',
+  title: 'onelogin',
+  icon: OneLoginIcon,
+};
+
+const OIDC_SCOPES: Set<String> = new Set([
+  'openid',
+  'profile',
+  'email',
+  'phone',
+  'address',
+  'groups',
+  'offline_access',
+]);
+
+const SCOPE_PREFIX: string = 'onelogin.';
+
+class OneLoginAuth {
+  static create({
+    discoveryApi,
+    environment = 'development',
+    provider = DEFAULT_PROVIDER,
+    oauthRequestApi,
+  }: CreateOptions): typeof oneloginAuthApiRef.T {
+    return OAuth2.create({
+      discoveryApi,
+      oauthRequestApi,
+      provider,
+      environment,
+      defaultScopes: ['openid', 'email', 'profile', 'offline_access'],
+      scopeTransform(scopes) {
+        return scopes.map(scope => {
+          if (OIDC_SCOPES.has(scope)) {
+            return scope;
+          }
+
+          if (scope.startsWith(SCOPE_PREFIX)) {
+            return scope;
+          }
+
+          return `${SCOPE_PREFIX}${scope}`;
+        });
+      },
+    });
+  }
+}
+
+export default OneLoginAuth;
diff --git a/packages/core-api/src/apis/implementations/auth/onelogin/index.ts b/packages/core-api/src/apis/implementations/auth/onelogin/index.ts
new file mode 100644
index 0000000000..1d163207db
--- /dev/null
+++ b/packages/core-api/src/apis/implementations/auth/onelogin/index.ts
@@ -0,0 +1,17 @@
+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export { default as OneLoginAuth } from './OneLoginAuth';
diff --git a/packages/core/src/api-wrappers/defaultApis.ts b/packages/core/src/api-wrappers/defaultApis.ts
index d0a777dc94..61d4f3a7e1 100644
--- a/packages/core/src/api-wrappers/defaultApis.ts
+++ b/packages/core/src/api-wrappers/defaultApis.ts
@@ -44,6 +44,8 @@ import {
   UrlPatternDiscovery,
   samlAuthApiRef,
   SamlAuth,
+  oneloginAuthApiRef,
+  OneLoginAuth,
 } from '@backstage/core-api';
 
 export const defaultApis = [
@@ -142,4 +144,13 @@ export const defaultApis = [
     },
     factory: ({ discoveryApi }) => SamlAuth.create({ discoveryApi }),
   }),
+  createApiFactory({
+    api: oneloginAuthApiRef,
+    deps: {
+      discoveryApi: discoveryApiRef,
+      oauthRequestApi: oauthRequestApiRef,
+    },
+    factory: ({ discoveryApi, oauthRequestApi }) =>
+      OneLoginAuth.create({ discoveryApi, oauthRequestApi }),
+  }),
 ];
diff --git a/plugins/auth-backend/package.json b/plugins/auth-backend/package.json
index caa20e361b..5a9364bf6c 100644
--- a/plugins/auth-backend/package.json
+++ b/plugins/auth-backend/package.json
@@ -45,6 +45,7 @@
     "passport-microsoft": "^0.1.0",
     "passport-oauth2": "^1.5.0",
     "passport-okta-oauth": "^0.0.1",
+    "passport-onelogin-oauth": "^0.0.1",
     "passport-saml": "^1.3.3",
     "uuid": "^8.0.0",
     "winston": "^3.2.1",
diff --git a/plugins/auth-backend/src/lib/passport/PassportStrategyHelper.ts b/plugins/auth-backend/src/lib/passport/PassportStrategyHelper.ts
index 3264fd8faa..28f15ee9e8 100644
--- a/plugins/auth-backend/src/lib/passport/PassportStrategyHelper.ts
+++ b/plugins/auth-backend/src/lib/passport/PassportStrategyHelper.ts
@@ -116,7 +116,6 @@ export const executeFrameHandlerStrategy = async <T, PrivateInfo = never>(
       strategy.redirect = () => {
         reject(new Error('Unexpected redirect'));
       };
-
       strategy.authenticate(req, {});
     },
   );
diff --git a/plugins/auth-backend/src/providers/factories.ts b/plugins/auth-backend/src/providers/factories.ts
index 37761c2305..a764d0b50e 100644
--- a/plugins/auth-backend/src/providers/factories.ts
+++ b/plugins/auth-backend/src/providers/factories.ts
@@ -22,6 +22,7 @@ import { createOktaProvider } from './okta';
 import { createSamlProvider } from './saml';
 import { createAuth0Provider } from './auth0';
 import { createMicrosoftProvider } from './microsoft';
+import { createOneLoginProvider } from './onelogin';
 import { AuthProviderFactory, AuthProviderFactoryOptions } from './types';
 
 const factories: { [providerId: string]: AuthProviderFactory } = {
@@ -33,6 +34,7 @@ const factories: { [providerId: string]: AuthProviderFactory } = {
   auth0: createAuth0Provider,
   microsoft: createMicrosoftProvider,
   oauth2: createOAuth2Provider,
+  onelogin: createOneLoginProvider,
 };
 
 export function createAuthProvider(
diff --git a/plugins/auth-backend/src/providers/onelogin/index.ts b/plugins/auth-backend/src/providers/onelogin/index.ts
new file mode 100644
index 0000000000..79af226cd1
--- /dev/null
+++ b/plugins/auth-backend/src/providers/onelogin/index.ts
@@ -0,0 +1,17 @@
+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export { createOneLoginProvider } from './provider';
diff --git a/plugins/auth-backend/src/providers/onelogin/provider.ts b/plugins/auth-backend/src/providers/onelogin/provider.ts
new file mode 100644
index 0000000000..97cf182e5a
--- /dev/null
+++ b/plugins/auth-backend/src/providers/onelogin/provider.ts
@@ -0,0 +1,173 @@
+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { Strategy as OneLoginStrategy } from 'passport-onelogin-oauth';
+import express from 'express';
+import {
+  OAuthAdapter,
+  OAuthProviderOptions,
+  OAuthHandlers,
+  OAuthResponse,
+  OAuthEnvironmentHandler,
+  OAuthStartRequest,
+  encodeState,
+  OAuthRefreshRequest,
+} from '../../lib/oauth';
+import passport from 'passport';
+import {
+  executeFrameHandlerStrategy,
+  executeRedirectStrategy,
+  executeRefreshTokenStrategy,
+  makeProfileInfo,
+  executeFetchUserProfileStrategy,
+  PassportDoneCallback,
+} from '../../lib/passport';
+import { RedirectInfo, AuthProviderFactory } from '../types';
+
+type PrivateInfo = {
+  refreshToken: string;
+};
+
+export type OneLoginProviderOptions = OAuthProviderOptions & {
+  issuer: string;
+};
+
+export class OneLoginProvider implements OAuthHandlers {
+  private readonly _strategy: any;
+
+  constructor(options: OneLoginProviderOptions) {
+    this._strategy = new OneLoginStrategy(
+      {
+        issuer: options.issuer,
+        clientID: options.clientId,
+        clientSecret: options.clientSecret,
+        callbackURL: options.callbackUrl,
+        passReqToCallback: false as true,
+      },
+      (
+        accessToken: any,
+        refreshToken: any,
+        params: any,
+        rawProfile: passport.Profile,
+        done: PassportDoneCallback<OAuthResponse, PrivateInfo>,
+      ) => {
+        const profile = makeProfileInfo(rawProfile, params.id_token);
+
+        done(
+          undefined,
+          {
+            providerInfo: {
+              idToken: params.id_token,
+              accessToken,
+              scope: params.scope,
+              expiresInSeconds: params.expires_in,
+            },
+            profile,
+          },
+          {
+            refreshToken,
+          },
+        );
+      },
+    );
+  }
+  async start(req: OAuthStartRequest): Promise<RedirectInfo> {
+    return await executeRedirectStrategy(req, this._strategy, {
+      accessType: 'offline',
+      prompt: 'consent',
+      scope: 'openid',
+      state: encodeState(req.state),
+    });
+  }
+
+  async handler(
+    req: express.Request,
+  ): Promise<{ response: OAuthResponse; refreshToken: string }> {
+    const { response, privateInfo } = await executeFrameHandlerStrategy<
+      OAuthResponse,
+      PrivateInfo
+    >(req, this._strategy);
+
+    return {
+      response: await this.populateIdentity(response),
+      refreshToken: privateInfo.refreshToken,
+    };
+  }
+
+  async refresh(req: OAuthRefreshRequest): Promise<OAuthResponse> {
+    const { accessToken, params } = await executeRefreshTokenStrategy(
+      this._strategy,
+      req.refreshToken,
+      req.scope,
+    );
+
+    const profile = await executeFetchUserProfileStrategy(
+      this._strategy,
+      accessToken,
+      params.id_token,
+    );
+
+    return this.populateIdentity({
+      providerInfo: {
+        accessToken,
+        idToken: params.id_token,
+        expiresInSeconds: params.expires_in,
+        scope: params.scope,
+      },
+      profile,
+    });
+  }
+
+  private async populateIdentity(
+    response: OAuthResponse,
+  ): Promise<OAuthResponse> {
+    const { profile } = response;
+
+    if (!profile.email) {
+      throw new Error('OIDC profile contained no email');
+    }
+
+    const id = profile.email.split('@')[0];
+
+    return { ...response, backstageIdentity: { id } };
+  }
+}
+
+export const createOneLoginProvider: AuthProviderFactory = ({
+  globalConfig,
+  config,
+  tokenIssuer,
+}) =>
+  OAuthEnvironmentHandler.mapConfig(config, envConfig => {
+    const providerId = 'onelogin';
+    const clientId = envConfig.getString('clientId');
+    const clientSecret = envConfig.getString('clientSecret');
+    const issuer = envConfig.getString('issuer');
+    const callbackUrl = `${globalConfig.baseUrl}/${providerId}/handler/frame`;
+
+    const provider = new OneLoginProvider({
+      clientId,
+      clientSecret,
+      callbackUrl,
+      issuer,
+    });
+
+    return OAuthAdapter.fromConfig(globalConfig, provider, {
+      disableRefresh: false,
+      providerId,
+      tokenIssuer,
+    });
+  });
diff --git a/plugins/auth-backend/src/providers/onelogin/types.d.ts b/plugins/auth-backend/src/providers/onelogin/types.d.ts
new file mode 100644
index 0000000000..d418f1bcd4
--- /dev/null
+++ b/plugins/auth-backend/src/providers/onelogin/types.d.ts
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+declare module 'passport-onelogin-oauth' {
+  export class Strategy {
+    constructor(options: any, verify: any);
+  }
+}
diff --git a/yarn.lock b/yarn.lock
index 06cab2d9ed..38a37b8ab3 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -18065,6 +18065,15 @@ passport-okta-oauth@^0.0.1:
     pkginfo "0.2.x"
     uid2 "0.0.3"
 
+passport-onelogin-oauth@^0.0.1:
+  version "0.0.1"
+  resolved "https://registry.npmjs.org/passport-onelogin-oauth/-/passport-onelogin-oauth-0.0.1.tgz#6e991ac6720783fdd80d4caa08c36cc71ef19962"
+  integrity sha512-EXFBqlJdHf5AX4QaiZsLfhgQUOR6z3zGA5479SUJF4I4rnAt7yasZEbs27pg8MRiQh/uLZEWLGMoVXr6LHV9mQ==
+  dependencies:
+    passport-oauth "1.0.0"
+    pkginfo "0.2.x"
+    uid2 "0.0.3"
+
 passport-saml@^1.3.3:
   version "1.3.3"
   resolved "https://registry.npmjs.org/passport-saml/-/passport-saml-1.3.3.tgz#cbea1a2b21ff32b3bc4bfd84dc39c3a370df9935"