diff --git a/fiesta/apps/accounts/social.py b/fiesta/apps/accounts/social.py
new file mode 100644
index 00000000..42ae1aac
--- /dev/null
+++ b/fiesta/apps/accounts/social.py
@@ -0,0 +1,13 @@
+from allauth.socialaccount.models import SocialAccount, SocialLogin
+from django.http import HttpRequest
+from allauth.socialaccount.adapter import DefaultSocialAccountAdapter
+
+from apps.esnaccounts.provider import ESNAccountsProvider
+
+
+class SocialAccountAdapter(DefaultSocialAccountAdapter):
+    def pre_social_login(self, request: HttpRequest, login: SocialLogin):
+
+        sa: SocialAccount = login.account
+        if sa.provider == ESNAccountsProvider.id:
+            ESNAccountsProvider.pre_social_login(request, login)
diff --git a/fiesta/apps/esnaccounts/provider.py b/fiesta/apps/esnaccounts/provider.py
index a2ca4d1a..94a01bfa 100644
--- a/fiesta/apps/esnaccounts/provider.py
+++ b/fiesta/apps/esnaccounts/provider.py
@@ -1,9 +1,20 @@
+import typing
+
 from allauth.socialaccount.providers.base import ProviderAccount
 from allauth_cas.providers import CASProvider
+from django.http import HttpRequest
+
+from apps.accounts.models import User
+from apps.sections.models import Section, SectionMembership
+
+if typing.TYPE_CHECKING:
+    from allauth.socialaccount.models import SocialAccount, SocialLogin
 
 
 class ESNAccountsAccount(ProviderAccount):
-    pass
+    def get_avatar_url(self):
+        sa: 'SocialAccount' = self.account
+        return sa.extra_data.get('picture')
 
 
 class ESNAccountsProvider(CASProvider):
@@ -11,7 +22,51 @@ class ESNAccountsProvider(CASProvider):
     name = "ESN Accounts"
     account_class = ESNAccountsAccount
 
-    # TODO: fix extract_common_fields to load data from extra_data
+    def extract_common_fields(self, data):
+        uid, extra = data
+        return {
+            'username': extra.get('username', uid),
+            'email': extra.get('mail'),
+            'first_name': extra.get('first'),
+            'last_name': extra.get('last'),
+        }
+
+    MEMBER_ROLE = 'Local.activeMember'
+    EDITOR_ROLE = 'Local.regularBoardMember'
+
+    @classmethod
+    def pre_social_login(
+            cls,
+            request: HttpRequest,
+            login: 'SocialLogin',
+    ):
+        user: User = login.user
+        sa: SocialAccount = login.account
+        roles = sa.extra_data.get('roles', [])
+        section_code = sa.extra_data.get('sc')
+        section_name = sa.extra_data.get('section')
+        user_nationality = sa.extra_data.get('nationality')
+        national_section = sa.extra_data.get('country')
+
+        user.save()
+        SectionMembership.objects.update_or_create(
+            user=user,
+            section=Section.objects.get_or_create(
+                name=section_name,
+                defaults=dict(
+                    code=section_code,
+                    # TODO: definitely not, user nationality != section assignment
+                    country=user_nationality,
+                )
+            )[0],
+            defaults=dict(
+                # TODO: check all possible for ESN Accounts roles
+                state=SectionMembership.State.ACTIVE,
+                role=SectionMembership.Role.EDITOR if cls.EDITOR_ROLE in roles
+                else SectionMembership.Role.MEMBER if cls.MEMBER_ROLE in roles
+                else SectionMembership.Role.INTERNATIONAL
+            )
+        )
 
 
 provider_classes = [ESNAccountsProvider]
diff --git a/fiesta/apps/sections/models/membership.py b/fiesta/apps/sections/models/membership.py
index 434628f8..488af1f1 100644
--- a/fiesta/apps/sections/models/membership.py
+++ b/fiesta/apps/sections/models/membership.py
@@ -43,6 +43,8 @@ class State(models.TextChoices):
         verbose_name=_("membership state"),
     )
 
+    # TODO: add flag to signalize, if membership has been added from ESN Accounts
+
     class Meta:
         verbose_name = _("section membership")
         verbose_name_plural = _("section memberships")
diff --git a/fiesta/apps/sections/models/section.py b/fiesta/apps/sections/models/section.py
index e5840c3a..54e68c7d 100644
--- a/fiesta/apps/sections/models/section.py
+++ b/fiesta/apps/sections/models/section.py
@@ -23,6 +23,13 @@ class Section(BaseTimestampedModel):
         help_text=_("Universities, for whose this section offers services."),
     )
 
+    code = models.SlugField(
+        verbose_name=_('code'),
+        help_text=_('Official code used in ESN world, especially in ESN Accounts database.'),
+        # TODO: remove blankness after proper migration from ESN accounts
+        null=True, blank=True,
+    )
+
     class Meta:
         verbose_name = _("ESN section")
         verbose_name_plural = _("ESN sections")
diff --git a/fiesta/fiesta/settings.py b/fiesta/fiesta/settings.py
index a8469c87..f14552a2 100644
--- a/fiesta/fiesta/settings.py
+++ b/fiesta/fiesta/settings.py
@@ -200,6 +200,7 @@
 ACCOUNT_USERNAME_MIN_LENGTH = 4  # a personal preference
 ACCOUNT_SESSION_REMEMBER = True  # None by default (to ask 'Remember me?'). I want the user to be always logged in
 ACCOUNT_DEFAULT_HTTP_PROTOCOL = "https"
+SOCIALACCOUNT_ADAPTER = 'apps.accounts.social.SocialAccountAdapter'
 
 LOGIN_URL = "/accounts/auth/login"
 LOGIN_REDIRECT_URL = "/accounts/profile"