Mr. Marshall is an internationally recognized expert in Laser Safety. Before he retired from the US Army after 37 years of service, he was in charge of the US Army Laser Safety Program. He chaired the ANSI Z136 SSC-6 during the production of the first and subsequent edition of the ANSI Z136.6 Standard for Safe Use of Lasers Outdoors. He also chaired the SAE G-10T Laser Safety Hazards Subcommittee and was instrumental in the publication of AS 6029A, containing FAA acceptable criteria for safe operation of lasers in airspace. He currently chairs the ANSI Z136 TC-7, which maintains the example calculations sections in the series of ANSI Z136 standards.
Mr. Marshall has taught laser safety classes for organizations such as the US Army, NATO, NIST, and OSHA. He has also provided briefings and lectures on Laser Safety at the International Laser Safety Conference, the DOE Laser Safety Officer Workshop, and other international meetings and conferences.
Mr. Marshall is a fellow of LIA, and recipient of the 2017 Wilkening Award. He has published over 50 peer reviewed articles on laser hazard calculation methods in Journals such as Applied Optics, the Health Physics Journal, the American Industrial Hygiene Journal, and the Journal of Laser Applications.
Mr. Marshall holds a MS in physics, and a BS in physics and mathematics from Eastern Illinois University and is a certified laser safety officer.