Mark began his career as a Clastic Stratigraphic specialist in Upstream Technology of Phillips Petroleum/ConocoPhillips and then moved into several technical and leadership positions globally in Development and Exploration before returning to the technology organization as Manager of the Sedimentology & Stratigraphy Group. He moved to Apache Corporation in 2015 as the Geological Manager for Exploration & Production Technology before becoming Suriname Geoscience Lead on the exploration phase that led to numerous discoveries. Mark then became Director of Geology where he was responsible for the organizational structure, training, career development and technical assurance for all geologists in Development and Exploration worldwide.

Throughout his career, Mark has developed a broad range of experience in the integrated evaluation of conventional and unconventional reservoirs from Basin Analysis to Reservoir Characterization in numerous basins and depositional systems worldwide (onshore, offshore, high temperature/high pressure, tight gas, heavy oil). He has led classroom & field-based training in subsurface characterization for > 500 geoscientists/engineers and defined competencies and training curriculum for geoscience career development.