diff --git a/src/main/kotlin/application/presenter/external/serialization/ExternalServiceSerialization.kt b/src/main/kotlin/application/presenter/external/serialization/ExternalServiceSerialization.kt
index d1451886..5071de10 100644
--- a/src/main/kotlin/application/presenter/external/serialization/ExternalServiceSerialization.kt
+++ b/src/main/kotlin/application/presenter/external/serialization/ExternalServiceSerialization.kt
@@ -9,8 +9,15 @@
 package application.presenter.external.serialization
 
 import application.presenter.external.model.HealthcareUserResultDto
+import application.presenter.external.model.TrackingInfoResultDto
+import application.presenter.external.model.TrackingTypeResultDto
 import entity.healthcareuser.HealthcareUser
 import entity.healthcareuser.TaxCode
+import entity.healthprofessional.HealthProfessionalID
+import entity.room.RoomID
+import entity.tracking.TrackType
+import entity.tracking.TrackingInfo
+import java.time.Instant
 
 /**
  * Serialization for external system.
@@ -25,4 +32,20 @@ object ExternalServiceSerialization {
         name = this.name,
         surname = this.surname,
     )
+
+    /**
+     * Extension method to obtain the [TrackingInfo] of an [HealthProfessionalID] from a [TrackingInfoResultDto].
+     * @return the deserialized tracking information about a health professional
+     */
+    fun TrackingInfoResultDto.toHealthProfessionalTrackingInfo(): TrackingInfo<HealthProfessionalID> = TrackingInfo(
+        dateTime = Instant.parse(this.dateTime),
+        individual = HealthProfessionalID(this.healthProfessionalId),
+        roomID = RoomID(this.roomId),
+        trackType = this.trackingType.toTrackingType(),
+    )
+
+    private fun TrackingTypeResultDto.toTrackingType(): TrackType = when (this) {
+        TrackingTypeResultDto.ENTER -> TrackType.ENTER
+        TrackingTypeResultDto.EXIT -> TrackType.EXIT
+    }
 }