About Us

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



Andrea, Paul, Charlie, Jim, and Victoria at AGU 2017.


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.