question for oxr holders

A question if I could people. I am doing some research on the Laos/Cambodia locations and looking for a geoligist who may have left a company in the region recently, in patricular OXR.

Could anyone here tell me which one of these people was involved with the original Sepon geological work/discovery? Also if any of these people no longer with OXR as in left recently?

Competent Persons listed on OXR reports:
Paul Quigley, Michael Stewart, Duncan Hackman, Chris Gerteisen, Arnold Van der Heyden, George Macfarlane
Elizabeth Florkiewicz, Paul Blackney, Robert Singer

Thanks in advance for any information you may have.