diff --git a/src/main/kotlin/infrastructure/provider/Provider.kt b/src/main/kotlin/infrastructure/provider/Provider.kt
index 32d19e79..a9d2b91f 100644
--- a/src/main/kotlin/infrastructure/provider/Provider.kt
+++ b/src/main/kotlin/infrastructure/provider/Provider.kt
@@ -8,11 +8,14 @@
 
 package infrastructure.provider
 
-import usecase.repository.TrackingDataRepository
+import application.controller.manager.StaffTrackingDatabaseManager
 
-/** The provider of the [TrackingDataRepository]. */
+/**
+ * It's responsible to provide the [StaffTrackingDatabaseManager]
+ * to Staff Tracking Controller.
+ */
 interface Provider {
 
-    /** The manager of staff tracking database operations. */
-    val trackingDatabaseManager: TrackingDataRepository
+    /** The manager of staff tracking inside database. */
+    val staffTrackingDatabaseManager: StaffTrackingDatabaseManager
 }
diff --git a/src/main/kotlin/infrastructure/provider/ProviderImpl.kt b/src/main/kotlin/infrastructure/provider/ProviderImpl.kt
index 015b2aae..297ae1b2 100644
--- a/src/main/kotlin/infrastructure/provider/ProviderImpl.kt
+++ b/src/main/kotlin/infrastructure/provider/ProviderImpl.kt
@@ -8,9 +8,12 @@
 
 package infrastructure.provider
 
-import usecase.repository.TrackingDataRepository
+import application.controller.manager.StaffTrackingDatabaseManager
+import infrastructure.database.MongoClient
 
-/** The implementation of the [Provider] interface. */
+/**
+ * The implementation of the [Provider] interface.
+ */
 class ProviderImpl : Provider {
 
     init {
@@ -19,5 +22,7 @@ class ProviderImpl : Provider {
         }
     }
 
-    override val trackingDatabaseManager: TrackingDataRepository = TODO() // MongoClient
+    override val staffTrackingDatabaseManager: StaffTrackingDatabaseManager by lazy {
+        MongoClient(System.getenv("STAFF_TRACKING_MONGODB_URL"))
+    }
 }