| 1983 - present | Metallurgical Consultant |
| Fowler, Inc. | |
| Gardena, CA | |
| 1987 - 1993 | Faculty, Institute of Safety and Systems Management (part time) |
| Safety Science Department | |
| University of Southern California | |
| Los Angeles, CA | |
| 1972 - 1983 | Metallurgical Engineer (part time 1972 – 1976) |
| Failure Analysis Associates | |
| Los Angeles, CA | |
| 1973 - 1976 | Postgraduate Research Engineer |
| University of California, Los Angeles | |
| Los Angeles, CA | |
| 1975 | Consultant |
| Association of American Railroads | |
| Chicago, IL |