diff --git a/src/backend/app/db/models.py b/src/backend/app/db/models.py
index cbc7bc409..aff4408dd 100644
--- a/src/backend/app/db/models.py
+++ b/src/backend/app/db/models.py
@@ -78,7 +78,7 @@
         ProjectUpdate,
     )
     from app.tasks.task_schemas import TaskEventIn
-    from app.users.user_schemas import UserIn
+    from app.users.user_schemas import UserIn, UserUpdate
 
 
 def dump_and_check_model(db_model: BaseModel):
@@ -314,6 +314,36 @@ async def create(
 
         return new_user
 
+    @classmethod
+    async def update(
+        cls, db: Connection, user_id: int, user_update: "UserUpdate"
+    ) -> Self:
+        """Update the role of a specific user."""
+        model_dump = dump_and_check_model(user_update)
+        placeholders = [f"{key} = %({key})s" for key in model_dump.keys()]
+        sql = f"""
+            UPDATE users
+            SET {", ".join(placeholders)}
+            WHERE id = %(user_id)s
+            RETURNING *;
+        """
+
+        async with db.cursor(row_factory=class_row(cls)) as cur:
+            await cur.execute(
+                sql,
+                {"user_id": user_id, **model_dump},
+            )
+            updated_user = await cur.fetchone()
+
+        if updated_user is None:
+            msg = f"Failed to update user with ID: {user_id}"
+            log.error(msg)
+            raise HTTPException(
+                status_code=HTTPStatus.INTERNAL_SERVER_ERROR, detail=msg
+            )
+
+        return updated_user
+
 
 class DbOrganisation(BaseModel):
     """Table organisations."""
diff --git a/src/backend/app/users/user_routes.py b/src/backend/app/users/user_routes.py
index 67bbdb0c3..9f1389790 100644
--- a/src/backend/app/users/user_routes.py
+++ b/src/backend/app/users/user_routes.py
@@ -58,6 +58,17 @@ async def get_user_roles(current_user: Annotated[DbUser, Depends(mapper)]):
     return user_roles
 
 
+@router.patch("/{user_id}", response_model=user_schemas.UserOut)
+async def update_existing_user(
+    user_id: int,
+    new_user_data: user_schemas.UserUpdate,
+    current_user: Annotated[DbUser, Depends(super_admin)],
+    db: Annotated[Connection, Depends(db_conn)],
+):
+    """Change the role of a user."""
+    return await DbUser.update(db=db, user_id=user_id, user_update=new_user_data)
+
+
 @router.get("/{id}", response_model=user_schemas.UserOut)
 async def get_user_by_identifier(
     user: Annotated[DbUser, Depends(get_user)],
diff --git a/src/backend/app/users/user_schemas.py b/src/backend/app/users/user_schemas.py
index 0084f3caa..58585597e 100644
--- a/src/backend/app/users/user_schemas.py
+++ b/src/backend/app/users/user_schemas.py
@@ -19,9 +19,9 @@
 
 from typing import Annotated, Optional
 
-from pydantic import BaseModel, Field
+from pydantic import AwareDatetime, BaseModel, Field
 
-from app.db.enums import UserRole
+from app.db.enums import ProjectRole, UserRole
 from app.db.models import DbUser, DbUserRole
 
 
@@ -34,6 +34,22 @@ class UserIn(DbUser):
     pass
 
 
+class UserUpdate(DbUser):
+    """User details for update in DB."""
+
+    # Exclude (do not allow update)
+    id: Annotated[Optional[int], Field(exclude=True)] = None
+    username: Annotated[Optional[str], Field(exclude=True)] = None
+    registered_at: Annotated[Optional[AwareDatetime], Field(exclude=True)] = None
+    tasks_mapped: Annotated[Optional[int], Field(exclude=True)] = None
+    tasks_validated: Annotated[Optional[int], Field(exclude=True)] = None
+    tasks_invalidated: Annotated[Optional[int], Field(exclude=True)] = None
+    project_roles: Annotated[Optional[dict[int, ProjectRole]], Field(exclude=True)] = (
+        None
+    )
+    orgs_managed: Annotated[Optional[list[int]], Field(exclude=True)] = None
+
+
 class UserOut(DbUser):
     """User with ID and role."""