diff --git a/.env b/.env
index 76c46ee..453697b 100644
--- a/.env
+++ b/.env
@@ -60,6 +60,13 @@ APP_DEFAULT_EMAIL_TO=team@ep-reisen.de
 
 XML_EXPORT_PATH="%kernel.project_dir%/var/xmlexport"
 
+MYEP_OAUTH2_CLIENT_ID=
+MYEP_OAUTH2_CLIENT_SECRET=
+MYEP_OAUTH2_URL_AUTHORIZE=https://my.ep-reisen.de/authorize
+MYEP_OAUTH2_URL_ACCESS_TOKEN=https://my.ep-reisen.de/token
+MYEP_OAUTH2_URL_RESOURCE_OWNER_DETAILS=https://my.ep-reisen.de/api/userinfo
+MYEP_OAUTH2_SCOPES=email,id,roles,profile
+
 ###> symfony/mailjet-mailer ###
 # MAILER_DSN=mailjet+api://PUBLIC_KEY:PRIVATE_KEY@api.mailjet.com
 # #MAILER_DSN=mailjet+smtp://PUBLIC_KEY:PRIVATE_KEY@in-v3.mailjet.com
diff --git a/composer.json b/composer.json
index 6e1e7a8..19c35c6 100644
--- a/composer.json
+++ b/composer.json
@@ -24,6 +24,7 @@
         "knplabs/knp-paginator-bundle": "^6.2",
         "league/flysystem-bundle": "^3.4",
         "league/flysystem-sftp-v3": "^3.29",
+        "league/oauth2-client": "^2.9",
         "liip/imagine-bundle": "^2.11",
         "maennchen/zipstream-php": "^3.1",
         "nelmio/security-bundle": "^3.0",
diff --git a/config/packages/security.yaml b/config/packages/security.yaml
index 7400747..6812335 100644
--- a/config/packages/security.yaml
+++ b/config/packages/security.yaml
@@ -20,6 +20,7 @@ security:
             lazy: true
             provider: bpn_user_provider
             custom_authenticators:
+                - App\Security\MyEpAuthenticator
                 - App\Security\BpnAuthenticator
             user_checker: App\Security\UserChecker
             switch_user:
diff --git a/config/services.yaml b/config/services.yaml
index 5a125ff..2368909 100644
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -230,3 +230,13 @@ services:
             $defaults:
                 from: '%default_email_from%'
                 to: '%default_email_to%'
+
+    App\Security\OAuth2\MyEpClient:
+        arguments:
+            $options:
+                myep_oauth2_client_id: '%env(MYEP_OAUTH2_CLIENT_ID)%'
+                myep_oauth2_client_secret: '%env(MYEP_OAUTH2_CLIENT_SECRET)%'
+                myep_oauth2_url_authorize: '%env(MYEP_OAUTH2_URL_AUTHORIZE)%'
+                myep_oauth2_url_access_token: '%env(MYEP_OAUTH2_URL_ACCESS_TOKEN)%'
+                myep_oauth2_url_resource_owner_details: '%env(MYEP_OAUTH2_URL_RESOURCE_OWNER_DETAILS)%'
+                myep_oauth2_scopes: '%env(csv:MYEP_OAUTH2_SCOPES)%'
diff --git a/src/Controller/Security/OAuth2Controller.php b/src/Controller/Security/OAuth2Controller.php
new file mode 100644
index 0000000..b44e520
--- /dev/null
+++ b/src/Controller/Security/OAuth2Controller.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Controller\Security;
+
+use App\Security\OAuth2\MyEpClient;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+class OAuth2Controller extends AbstractController
+{
+    public function __construct(private readonly MyEpClient $client)
+    {
+    }
+
+    #[Route('/myep-auth/init', name: 'app_myep_auth_init')]
+    public function init(Request $request): Response
+    {
+        $provider = $this->client->getProvider();
+        $url = $provider->getAuthorizationUrl();
+        $state = $provider->getState();
+        $request->getSession()->set('oauth2state', $state);
+
+        return $this->redirect($url);
+    }
+
+    #[Route('/myep-auth/check', name: 'app_myep_auth_check')]
+    public function check(): void
+    {
+    }
+}
diff --git a/src/Entity/Embeddable/Address.php b/src/Entity/Embeddable/Address.php
index 7e4a0bd..bcc4f63 100644
--- a/src/Entity/Embeddable/Address.php
+++ b/src/Entity/Embeddable/Address.php
@@ -83,6 +83,19 @@ class Address
         return $instance;
     }
 
+    public static function fromUserinfo(array $userinfo): static
+    {
+        $instance = new static();
+        $instance
+            ->setStreet($userinfo['profile']['address']['street'] ?? null)
+            ->setPostCode($userinfo['profile']['address']['postcode'] ?? null)
+            ->setCity($userinfo['profile']['address']['city'] ?? null)
+            ->setCountry($userinfo['profile']['address']['country'] ?? 'DE')
+        ;
+
+        return $instance;
+    }
+
     public function getStreet(): ?string
     {
         return $this->street;
diff --git a/src/Entity/Embeddable/Communication.php b/src/Entity/Embeddable/Communication.php
index 2520490..bca3cb3 100644
--- a/src/Entity/Embeddable/Communication.php
+++ b/src/Entity/Embeddable/Communication.php
@@ -65,6 +65,18 @@ class Communication
         return $instance;
     }
 
+    public static function fromUserinfo(array $userinfo): static
+    {
+        $instance = new static();
+        $instance
+            ->setPhone($userinfo['profile']['communication']['phone'] ?? null)
+            ->setMobile($userinfo['profile']['communication']['mobile'] ?? null)
+            ->setEmail($userinfo['profile']['communication']['email'] ?? null)
+        ;
+
+        return $instance;
+    }
+
     public function getPhone(): ?string
     {
         return $this->phone;
diff --git a/src/Entity/Teamer.php b/src/Entity/Teamer.php
index 9a32cd4..5bded01 100644
--- a/src/Entity/Teamer.php
+++ b/src/Entity/Teamer.php
@@ -238,6 +238,37 @@ class Teamer implements TimestampableEntityInterface, SoftDeletableEntityInterfa
         return $instance;
     }
 
+    public static function fromUserinfo(array $userinfo): static
+    {
+        $instance = new static();
+
+        $instance
+            ->setAcademicTitle($userinfo['profile']['title'] ?? null)
+            ->setSalutation($userinfo['profile']['salutation'] ?? null)
+            ->setFirstName($userinfo['profile']['first_name'] ?? null)
+            ->setLastName($userinfo['profile']['last_name'] ?? null)
+            ->setGender($userinfo['profile']['gender'] ?? null)
+        ;
+
+        if (null !== $userinfo['profile']['date_of_birth'] ?? null) {
+            try {
+                $dateOfBirth = new \DateTimeImmutable(['profile']['date_of_birth']);
+                $instance->setDateOfBirth($dateOfBirth);
+            } catch (\Exception $e) {
+            }
+        }
+
+        $address = Address::fromUserinfo($userinfo);
+        $communication = Communication::fromUserinfo($userinfo);
+
+        $instance
+            ->setAddress($address)
+            ->setCommunication($communication)
+        ;
+
+        return $instance;
+    }
+
     public function getId(): ?int
     {
         return $this->id;
diff --git a/src/Security/MyEpAuthenticator.php b/src/Security/MyEpAuthenticator.php
new file mode 100644
index 0000000..2349333
--- /dev/null
+++ b/src/Security/MyEpAuthenticator.php
@@ -0,0 +1,168 @@
+<?php
+
+namespace App\Security;
+
+use App\BusProNet\UserDataHandler;
+use App\Entity\Teamer;
+use App\Entity\User;
+use App\Security\OAuth2\AuthorizationRequestException;
+use App\Security\OAuth2\MyEpClient;
+use Doctrine\ORM\EntityManagerInterface;
+use League\OAuth2\Client\Provider\Exception\IdentityProviderException;
+use Psr\Http\Client\ClientExceptionInterface;
+use Psr\Log\LoggerInterface;
+use Symfony\Component\HttpFoundation\RedirectResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
+use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
+use Symfony\Component\Security\Core\Exception\AuthenticationException;
+use Symfony\Component\Security\Core\Exception\CustomUserMessageAuthenticationException;
+use Symfony\Component\Security\Http\Authenticator\AbstractAuthenticator;
+use Symfony\Component\Security\Http\Authenticator\Passport\Badge\UserBadge;
+use Symfony\Component\Security\Http\Authenticator\Passport\Passport;
+use Symfony\Component\Security\Http\Authenticator\Passport\SelfValidatingPassport;
+use Symfony\Component\Security\Http\Util\TargetPathTrait;
+
+class MyEpAuthenticator extends AbstractAuthenticator
+{
+    private const ELIGIBLE_ROLES = ['ROLE_ADMIN', 'ROLE_TEAMER', 'ROLE_MANAGER', 'ROLE_HOUSE_MANAGER'];
+
+    use TargetPathTrait;
+
+    public function __construct(
+        private readonly MyEpClient $client,
+        private readonly UserDataHandler $userDataHandler,
+        private readonly EntityManagerInterface $entityManager,
+        private readonly UrlGeneratorInterface $urlGenerator,
+        private readonly LoggerInterface $logger,
+    ) {
+    }
+
+    public function supports(Request $request): ?bool
+    {
+        return 'app_myep_auth_check' === $request->attributes->get('_route');
+    }
+
+    public function authenticate(Request $request): Passport
+    {
+        try {
+            $accessToken = $this->client->fetchAccessToken($request);
+        } catch (AuthorizationRequestException|IdentityProviderException $e) {
+            throw new CustomUserMessageAuthenticationException('Invalid token');
+        }
+
+        try {
+            $provider = $this->client->getProvider();
+            $url = $provider->getResourceOwnerDetailsUrl($accessToken);
+            $request = $provider->getAuthenticatedRequest('GET', $url, $accessToken, [
+                'headers' => [
+                    'Accept' => 'application/json',
+                    'Content-Type' => 'application/json',
+                ],
+            ]);
+            $response = $provider->getHttpClient()->sendRequest($request);
+        } catch (ClientExceptionInterface $e) {
+            $this->logger->error('Login via MyE&P failed due to unexpected userinfo response');
+            throw new CustomUserMessageAuthenticationException('Login via MyE&P nicht möglich');
+        }
+        $userinfo = json_decode($response->getBody(), true);
+        $username = $userinfo['email'] ?? null;
+
+        if (null === $username) {
+            $this->logger->error('Login via MyE&P failed due to missing username claim');
+            throw new CustomUserMessageAuthenticationException('Login via MyE&P nicht möglich');
+        }
+
+        if (null !== $this->createOrUpdateUserFromUserinfo($userinfo)) {
+            return new SelfValidatingPassport(new UserBadge($username));
+        }
+
+        throw new CustomUserMessageAuthenticationException('Login via MyE&P nicht möglich');
+    }
+
+    public function onAuthenticationSuccess(Request $request, TokenInterface $token, string $firewallName): ?Response
+    {
+        /** @var User $user */
+        $user = $token->getUser();
+
+        $this->logger->info('Logged in');
+
+        if ($targetPath = $this->getTargetPath($request->getSession(), $firewallName)) {
+            return new RedirectResponse($targetPath);
+        }
+
+        $url = $this->urlGenerator->generate($user->getDefaultRoute());
+
+        return new RedirectResponse($url);
+    }
+
+    public function onAuthenticationFailure(Request $request, AuthenticationException $exception): ?Response
+    {
+        $request->getSession()->getBag('flashes')->add('error', $exception->getMessage());
+
+        $redirectUrl = $this->urlGenerator->generate('app_security_login');
+
+        return new RedirectResponse($redirectUrl);
+    }
+
+    private function createOrUpdateUserFromUserinfo(array $userinfo): ?User
+    {
+        // User is expected to have at least one role
+        if (false === isset($userinfo['roles']) || 0 === count($userinfo['roles'])) {
+            return null;
+        }
+
+        // User is expected to have at least one of the roles teamer, manager, house manager or admin
+        if ([] === array_intersect(self::ELIGIBLE_ROLES, $userinfo['roles'])) {
+            return null;
+        }
+
+        // Check if user is already present in local database
+        $user = $this
+            ->entityManager
+            ->getRepository(User::class)
+            ->findOneBy(['email' => $userinfo['email']])
+        ;
+
+        // Update existing user's roles and teamer data and return it
+        if (null !== $user) {
+            $user
+                ->setRoles($userinfo['roles'])
+                ->setHotelCodes($userinfo['profile']['hotel_codes'])
+                ->setLastLoginAt(new \DateTimeImmutable('now'))
+            ;
+
+            $this->entityManager->flush();
+
+            return $user;
+        }
+
+        $user = new User();
+        $user
+            ->setFirstName($userinfo['profile']['first_name'])
+            ->setLastName($userinfo['profile']['last_name'])
+            ->setEmail($userinfo['profile']['communication']['email'])
+            ->setBusProPersonId($userinfo['id'])
+            ->setHotelCodes($userinfo['profile']['hotel_codes'])
+            ->setRoles($userinfo['roles'])
+        ;
+
+        if (true === in_array('ROLE_TEAMER', $user->getRoles(), true)) {
+            $teamer = Teamer::fromUserinfo($userinfo);
+            $user->setTeamer($teamer);
+
+            $this->entityManager->persist($teamer);
+
+            $this->logger->info('Create teamer', [
+                'teamer_id' => $teamer->getId(),
+                'teamer_name' => (string) $teamer,
+            ]);
+        }
+
+        $this->entityManager->persist($user);
+        $this->entityManager->flush();
+
+        return $user;
+    }
+}
diff --git a/src/Security/OAuth2/AuthorizationRequestException.php b/src/Security/OAuth2/AuthorizationRequestException.php
new file mode 100644
index 0000000..fdb8474
--- /dev/null
+++ b/src/Security/OAuth2/AuthorizationRequestException.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Security\OAuth2;
+
+use Symfony\Component\HttpFoundation\Request;
+
+class AuthorizationRequestException extends \Exception
+{
+    private Request $request;
+
+    public function __construct($message, $code, $request)
+    {
+        $this->request = $request;
+
+        parent::__construct($message, $code);
+    }
+
+    public function getRequest(): Request
+    {
+        return $this->request;
+    }
+}
\ No newline at end of file
diff --git a/src/Security/OAuth2/MyEpClient.php b/src/Security/OAuth2/MyEpClient.php
new file mode 100644
index 0000000..c904015
--- /dev/null
+++ b/src/Security/OAuth2/MyEpClient.php
@@ -0,0 +1,82 @@
+<?php
+
+namespace App\Security\OAuth2;
+
+use League\OAuth2\Client\Provider\AbstractProvider;
+use League\OAuth2\Client\Provider\Exception\IdentityProviderException;
+use League\OAuth2\Client\Provider\GenericProvider;
+use League\OAuth2\Client\Token\AccessTokenInterface;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
+
+class MyEpClient
+{
+    private array $config;
+
+    public function __construct(private readonly UrlGeneratorInterface $urlGenerator, array $options)
+    {
+        $this->config = $this->resolveConfig($options);
+    }
+
+    /**
+     * @throws IdentityProviderException
+     * @throws AuthorizationRequestException
+     */
+    public function fetchAccessToken(Request $request): AccessTokenInterface
+    {
+        if (null === $code = $request->query->get('code')) {
+            throw new AuthorizationRequestException('Missing code', 400, $request);
+        }
+
+        $session = $request->getSession();
+
+        if (
+            null === $request->query->get('state')
+            || $request->query->get('state') !== $session->get('oauth2state')
+        ) {
+            $session->remove('oauth2state');
+            throw new AuthorizationRequestException('Missing state or mismatch', 400, $request);
+        }
+
+        $session->remove('oauth2state');
+
+        return $this->getProvider()->getAccessToken('authorization_code', [
+            'code' => $code,
+        ]);
+    }
+
+    public function getProvider(): AbstractProvider
+    {
+        $redirectUrl = $this
+            ->urlGenerator
+            ->generate('app_myep_auth_check', [], UrlGeneratorInterface::ABSOLUTE_URL)
+        ;
+
+        return new GenericProvider([
+            'clientId' => $this->config['myep_oauth2_client_id'],
+            'clientSecret' => $this->config['myep_oauth2_client_secret'],
+            'redirectUri' => $redirectUrl,
+            'urlAuthorize' => $this->config['myep_oauth2_url_authorize'],
+            'urlAccessToken' => $this->config['myep_oauth2_url_access_token'],
+            'urlResourceOwnerDetails' => $this->config['myep_oauth2_url_resource_owner_details'],
+            'scopes' => $this->config['myep_oauth2_scopes'],
+            'scopeSeparator' => ' ',
+        ]);
+    }
+
+    private function resolveConfig(array $options): array
+    {
+        $optionsResolver = new OptionsResolver();
+        $optionsResolver->setRequired([
+            'myep_oauth2_client_id',
+            'myep_oauth2_client_secret',
+            'myep_oauth2_url_authorize',
+            'myep_oauth2_url_access_token',
+            'myep_oauth2_url_resource_owner_details',
+            'myep_oauth2_scopes',
+        ]);
+
+        return $optionsResolver->resolve($options);
+    }
+}
diff --git a/templates/security/login.html.twig b/templates/security/login.html.twig
index fec040e..c56bcb8 100644
--- a/templates/security/login.html.twig
+++ b/templates/security/login.html.twig
@@ -45,7 +45,10 @@
                     </button>
                     <input type="hidden" name="_csrf_token" value="{{ csrf_token('authenticate') }}">
                 </form>
-                <div class="pt-4">
+                <div class="pt-4 flex space-x-4">
+                    <a href="{{ path('app_myep_auth_init') }}" class="text-sm underline">
+                        Login mit MyE&amp;P
+                    </a>
                     <a href="{{ path('app_security_password_reset') }}" class="text-sm underline">
                         Passwort vergessen?
                     </a>
@@ -53,4 +56,4 @@
             </div>
         </div>
 
-{% endblock %}
\ No newline at end of file
+{% endblock %}