Thanks to Mark’s experience in surveying, he began to be used to do surveying for branch buildings and Assembly Halls of Jehovah’s Witnesses in South and Central America and the islands of the Caribbean.
Berkat pengalaman Mark dalam pengukuran tanah, ia mulai ditugasi mengukur tanah untuk berbagai bangunan kantor cabang dan Balai Kebaktian Saksi - Saksi Yehuwa di Amerika Selatan dan Tengah serta di Kepulauan Karibia.