Mark started in 1988 in Southern Africa (Zimbabwe) working on all Wild Heerbrugg Opti-Mechanical Survey Instruments and then joined Leica in both South Africa and Switzerland at the Leica Geosystems Factory. In 2006 he moved to Leica Geosystems in the USA managing all training on TPS / GPS and digital levels.  He now runs our Multistation /TPS/GPS and Digital Levels Workshop in Irving, TX.