diff --git a/src/domain/work-orders/api/work-orders-api.ts b/src/domain/work-orders/api/work-orders-api.ts
index ff5d59f0..8a298af7 100644
--- a/src/domain/work-orders/api/work-orders-api.ts
+++ b/src/domain/work-orders/api/work-orders-api.ts
@@ -110,18 +110,34 @@ function toUrlSearchParams(
   return sp;
 }
 
+function readOptionalString(item: Record<string, unknown>, ...keys: string[]): string {
+  for (const key of keys) {
+    const value = item[key];
+    if (typeof value === "string" && value.trim()) {
+      return value.trim();
+    }
+  }
+  return "";
+}
+
+/** GET User exposes `Name` as first name only; prefer FirstName + LastName when present. */
+function mapUserDisplayName(item: Record<string, unknown>): string {
+  const firstName = readOptionalString(item, "firstName", "FirstName");
+  const lastName = readOptionalString(item, "lastName", "LastName");
+  const fallback = readOptionalString(item, "name", "Name", "userName", "UserName");
+  if (lastName) {
+    return `${firstName || fallback} ${lastName}`.trim();
+  }
+  return firstName || fallback;
+}
+
 function mapUser(raw: unknown): WorkOrderUser {
   const item = (typeof raw === "object" && raw !== null ? raw : {}) as Record<string, unknown>;
   const id = item.id ?? item.Id;
-  const name =
-    (typeof item.name === "string" ? item.name : undefined) ??
-    (typeof item.Name === "string" ? item.Name : undefined) ??
-    (typeof item.userName === "string" ? item.userName : "") ??
-    "";
 
   return {
     id: typeof id === "string" || typeof id === "number" ? id : "",
-    name,
+    name: mapUserDisplayName(item),
   };
 }
 
diff --git a/src/test/domain/work-orders/api/work-orders-api.test.ts b/src/test/domain/work-orders/api/work-orders-api.test.ts
index a24381d0..28ca8c18 100644
--- a/src/test/domain/work-orders/api/work-orders-api.test.ts
+++ b/src/test/domain/work-orders/api/work-orders-api.test.ts
@@ -200,6 +200,33 @@ describe("workOrdersApi.fetchDispatchers", () => {
   });
 });
 
+const GET_USER_SERIALIZED_DIRECTORY = {
+  data: [
+    {
+      Id: "s1",
+      Name: "Alex",
+      FirstName: "Alex",
+      LastName: "Smith",
+      UserName: "alex.smith",
+    },
+  ],
+};
+
+describe("workOrdersApi.fetchUsers", () => {
+  beforeEach(() => {
+    apiGet.mockReset();
+  });
+
+  it("composes a full display name from the serialized GET User shape", async () => {
+    apiGet.mockResolvedValue(GET_USER_SERIALIZED_DIRECTORY);
+
+    const users = await workOrdersApi.fetchUsers();
+
+    expect(apiGet).toHaveBeenCalledWith(API_PATHS.user.list);
+    expect(users).toEqual([{ id: "s1", name: "Alex Smith" }]);
+  });
+});
+
 describe("workOrdersApi.getBoard", () => {
   beforeEach(() => {
     apiGet.mockReset();