About Us

Paul O’Sullivan, Ph.D., GSS Principal Manager and Chief Scientist
Andrea O'Sullivan, Administrative Manager
Jim McMillan, Facility Manager
Charlie Taylor, Technical Staff
Victoria Cross, Geologist/Technical Staff


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harlie, Jim, and Victoria at our GSS booth at Thermo2016.


Technical Personnel
Our GSS-trained technical personnel have a combined 15+ years of experience with mineral separation procedures and, combined, have processed thousands of samples. Our technical personnel follow defined Standard Operating Procedures (SOPs) when carrying out the various stages of sample processing. We are all dedicated to providing the highest quality mineral separations and pay close attention to detail through every step of the process.