diff --git a/enterprise/overrides/__init__.py b/enterprise/overrides/__init__.py
new file mode 100644
index 000000000..7f782fbea
--- /dev/null
+++ b/enterprise/overrides/__init__.py
@@ -0,0 +1,3 @@
+"""
+Pluggable override implementations for edx-enterprise.
+"""
diff --git a/enterprise/overrides/learner_home.py b/enterprise/overrides/learner_home.py
new file mode 100644
index 000000000..74812b7f0
--- /dev/null
+++ b/enterprise/overrides/learner_home.py
@@ -0,0 +1,35 @@
+"""
+Pluggable override for the learner home enterprise customer lookup.
+"""
+import logging
+
+log = logging.getLogger(__name__)
+
+
+def enterprise_get_enterprise_customer(prev_fn, user, request, is_masquerading):
+    """
+    Return the enterprise customer dict for the given user, or None.
+
+    This function overrides the default ``get_enterprise_customer`` implementation in
+    ``lms/djangoapps/learner_home/views.py`` via the pluggable override mechanism.
+
+    Arguments:
+        prev_fn: the previous (default) implementation — not called because we fully replace it.
+        user: the Django User object.
+        request: the current HTTP request.
+        is_masquerading (bool): True when the request is a staff masquerade.
+
+    Returns:
+        dict or None: enterprise customer data dict, or None if the user is not an
+        enterprise customer user.
+    """
+    # Deferred imports — will be replaced with internal paths in epic 17.
+    from openedx.features.enterprise_support.api import (  # pylint: disable=import-outside-toplevel
+        enterprise_customer_from_session_or_learner_data,
+        get_enterprise_learner_data_from_db,
+    )
+
+    if is_masquerading:
+        learner_data = get_enterprise_learner_data_from_db(user)
+        return learner_data[0]['enterprise_customer'] if learner_data else None
+    return enterprise_customer_from_session_or_learner_data(request)
diff --git a/tests/test_enterprise/test_overrides_learner_home.py b/tests/test_enterprise/test_overrides_learner_home.py
new file mode 100644
index 000000000..05a8f3f75
--- /dev/null
+++ b/tests/test_enterprise/test_overrides_learner_home.py
@@ -0,0 +1,76 @@
+"""
+Tests for enterprise.overrides.learner_home pluggable override.
+"""
+from unittest import TestCase
+from unittest.mock import MagicMock, patch
+
+
+ENTERPRISE_SUPPORT_API_PATH = 'openedx.features.enterprise_support.api'
+
+
+class TestEnterpriseGetEnterpriseCustomer(TestCase):
+    """
+    Tests for enterprise_get_enterprise_customer override function.
+    """
+
+    def _call(self, user=None, request=None, is_masquerading=False):
+        """Import and call the override function."""
+        # pylint: disable=import-outside-toplevel
+        from enterprise.overrides.learner_home import enterprise_get_enterprise_customer
+        prev_fn = MagicMock()
+        return enterprise_get_enterprise_customer(prev_fn, user, request, is_masquerading)
+
+    def test_non_masquerading_delegates_to_session_api(self):
+        """
+        When is_masquerading is False, should call
+        enterprise_customer_from_session_or_learner_data(request) and return its result.
+        """
+        request = MagicMock()
+        user = MagicMock()
+        expected = {'uuid': 'test-uuid'}
+        mock_api = MagicMock()
+        mock_api.enterprise_customer_from_session_or_learner_data.return_value = expected
+        mock_api.get_enterprise_learner_data_from_db.return_value = []
+
+        with patch.dict('sys.modules', {ENTERPRISE_SUPPORT_API_PATH: mock_api}):
+            result = self._call(user=user, request=request, is_masquerading=False)
+
+        mock_api.enterprise_customer_from_session_or_learner_data.assert_called_once_with(request)
+        mock_api.get_enterprise_learner_data_from_db.assert_not_called()
+        self.assertEqual(result, expected)
+
+    def test_masquerading_returns_enterprise_customer_from_db(self):
+        """
+        When is_masquerading is True and learner data exists, should return the
+        enterprise_customer from the first learner data entry.
+        """
+        user = MagicMock()
+        request = MagicMock()
+        enterprise_customer = {'uuid': 'ec-uuid', 'name': 'Test Enterprise'}
+        mock_api = MagicMock()
+        mock_api.get_enterprise_learner_data_from_db.return_value = [
+            {'enterprise_customer': enterprise_customer}
+        ]
+
+        with patch.dict('sys.modules', {ENTERPRISE_SUPPORT_API_PATH: mock_api}):
+            result = self._call(user=user, request=request, is_masquerading=True)
+
+        mock_api.get_enterprise_learner_data_from_db.assert_called_once_with(user)
+        mock_api.enterprise_customer_from_session_or_learner_data.assert_not_called()
+        self.assertEqual(result, enterprise_customer)
+
+    def test_masquerading_returns_none_when_no_learner_data(self):
+        """
+        When is_masquerading is True but no learner data exists, should return None.
+        """
+        user = MagicMock()
+        request = MagicMock()
+        mock_api = MagicMock()
+        mock_api.get_enterprise_learner_data_from_db.return_value = []
+
+        with patch.dict('sys.modules', {ENTERPRISE_SUPPORT_API_PATH: mock_api}):
+            result = self._call(user=user, request=request, is_masquerading=True)
+
+        mock_api.get_enterprise_learner_data_from_db.assert_called_once_with(user)
+        mock_api.enterprise_customer_from_session_or_learner_data.assert_not_called()
+        self.assertIsNone(result)