John graduated from Colorado School of Mines in 2006 with a doctorate in applied chemistry with a focus on mass spectrometry.  Afterwards, he took a postdoctoral position at the National Renewable Energy Laboratory in Golden, CO.  John joined JEOL USA, Inc. in 2008 as an MS applications chemist supporting all MS product lines, which include GC-MS, GCxGC-MS, MALDI-MS, and DART-MS. John was promoted to MS Product Manager in October 2020.