Professional Engineer, California No. M14229 (Mechanical)
Professional Engineer, California No. SF2856 (Safety)
Professional Engineer, Arizona No. 7772 (Retired – Inactive Status)
Staff Engineer, Vollmer-Gray Engineering Laboratories, Inc. (January 2000 to present), Partner, Vollmer-Gray Engineering Laboratories (July 1977 to December 1999). Mechanical failure analysis, metallurgical failure analysis, accident reconstruction, fire analysis.
Owner, Vollmer Engineering Laboratories (February 1970 to June 1977). Failure analysis, test engineering, design evaluation, stress analysis, accident reconstruction.
Partner-Technical Director, Snyder Research Laboratory (April 1969 to January 1970). Failure analysis and accident reconstruction.
Director of Experimental Mechanics, Truesdail Laboratories (August 1967 to March 1969). Failure analysis, test engineering, design of data acquisition systems, and structural analysis of mechanical systems.
Member of the Technical Staff, Mechanics Research, Inc. (January 1966 to August 1967). Engineering consultant in experimental mechanics. Static and dynamic structural analysis of mechanical systems for crash, off-shore oil platforms, highway trucks, roads and guided missiles. Consultant to Truesdail Laboratories.
Staff Engineer, Truesdail Laboratories, Inc. (July 1964 to January 1966). Failure analysis, test engineering, metallurgical evaluations, static and dynamic testing of mechanical devices.
Member of the Technical Staff, Space General Corporation (January 1963 to July 1964). Design of dynamic load and operational tests of Thrust Control system for Minuteman Missile. Design of special test equipment, designed high pressure, high temperature pneumatic test system.
Test Engineer, Ordinance Associates (March 1962 to January 1963). Designed experiments and data acquisition systems for explosive devices.
Test Engineer, General Dynamics/Astronautics, Vanderburg Air Force Base (September 1961 to March 1962).
Instructor, Milwaukee School of Engineering (1960 to 1961). Instructor of Metallurgical and Thermodynamic Laboratory courses.
Automotive and truck defect analysis: brakes, throttle, steering, tires, suspension, drive trains, seats, controls, fuel systems. Aircraft defect analysis: propeller, engine, seat belts, fuel system failure.
Industrial accidents: punch presses, printing machines, packaging machines, furnaces, saws, woodworking machines, man lifts, scaffolding, ladders, cranes.
Accident reconstruction: intersection collisions, pedestrian vs. Auto, single-car loss of control, phantom car hit-and-run.
Fire analysis: automobile, truck, boat, structure and industrial.
Miscellaneous: golf carts, plumbing, slip and fall, gas appliances, boats, lawnmowers, furniture failure.
SAE Technical Paper 921594 Changes in Automotive Failures, from Automobile Safety: Present and Future Technology (SP-925), 1992
Automotive Engineering and Litigation, Chapter 5, Modifications, Maintenance and Repairs, co-author with Cory Gray, 1983
Off Shore Structural Tests, Ocean Engineering Conference, 1968
Crash Load Environment Study, Federal Aviation Agency, 1966
Society of Automotive Engineers
American Society of Metals