| 1988 - present | Independent Consultant |
| Pacific Metallurgical Company | |
| Los Angeles, CA | |
| 1982 - 1988 | Senior Member Technical Staff |
| Scanning Electron Analysis Laboratories, Inc. | |
| Los Angeles, CA | |
| 1982 | Corrosion Scientist |
| Revere Research, Inc. | |
| Edison, NJ | |
| 1981 - 1982 | Staff Research Associate |
| University of California, Los Angeles | |
| Los Angeles, CA | |
| 1976 - 1981 | Consultant |
| Association of Scientific Advisors | |
| Los Angeles, CA |