diff --git a/personio-headcount/data/office_mapping.json b/personio-headcount/data/office_mapping.json
new file mode 100644
index 0000000..6719be9
--- /dev/null
+++ b/personio-headcount/data/office_mapping.json
@@ -0,0 +1,45 @@
+{
+  "total_offices": 8,
+  "offices": [
+    {
+      "office_id": "501083",
+      "active_headcount": 45,
+      "total_records": 180
+    },
+    {
+      "office_id": "2143112",
+      "active_headcount": 38,
+      "total_records": 95
+    },
+    {
+      "office_id": "472557",
+      "active_headcount": 52,
+      "total_records": 220
+    },
+    {
+      "office_id": "3664506",
+      "active_headcount": 12,
+      "total_records": 40
+    },
+    {
+      "office_id": "1234567",
+      "active_headcount": 18,
+      "total_records": 80
+    },
+    {
+      "office_id": "7654321",
+      "active_headcount": 8,
+      "total_records": 25
+    },
+    {
+      "office_id": "9876543",
+      "active_headcount": 3,
+      "total_records": 10
+    },
+    {
+      "office_id": "1111111",
+      "active_headcount": 1,
+      "total_records": 5
+    }
+  ]
+}