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.
Tänu maamõõtmisoskusele hakati Marki kasutama nii Lõuna - ja Kesk - Ameerika kui ka Kariibi mere saarte harubüroode ja kokkutulekusaalide ehitustel.