diff --git a/imperial_coldfront_plugin/migrations/0002_unixuid.py b/imperial_coldfront_plugin/migrations/0002_unixuid.py
new file mode 100644
index 0000000..faac991
--- /dev/null
+++ b/imperial_coldfront_plugin/migrations/0002_unixuid.py
@@ -0,0 +1,24 @@
+# Generated by Django 4.2.11 on 2024-11-21 14:41
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('imperial_coldfront_plugin', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='UnixUID',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('identifier', models.IntegerField()),
+                ('user', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, related_name='user_id', to=settings.AUTH_USER_MODEL)),
+            ],
+        ),
+    ]
diff --git a/imperial_coldfront_plugin/models.py b/imperial_coldfront_plugin/models.py
index deb78c6..9e05275 100644
--- a/imperial_coldfront_plugin/models.py
+++ b/imperial_coldfront_plugin/models.py
@@ -29,3 +29,24 @@ class GroupMembership(models.Model):
         on_delete=models.CASCADE,
         related_name="group_memberships_set",
     )
+
+
+class UnixUID(models.Model):
+    """Identity data to map a user to a unique identifier.
+
+    This model stores a unique identifier for each user, which can be used to
+    identify users in external systems. The identifier is an integer value that
+    is unique to each user user.
+
+    Attributes:
+        user (OneToOneField): A reference to the user, connected to AUTH_USER_MODEL.
+            Deletes the related identifier when the user is deleted.
+        identifier (IntegerField): A unique identifier for the user.
+    """
+
+    user = models.OneToOneField(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="user_id",
+    )
+    identifier = models.IntegerField()