| 1966 - present | Cambridge Computer Associates, Inc., |
| Cambridge, MA | |
| President |
| 1994 - present | The Arcon Group, Inc. |
| New York, New York | |
| Vice President |
| 1999 - present | |
| New York, New York | |
| Vice President |
| 1994 - present | A medical instrument firm |
| Greater Boston Ma | |
| Consultant |
| 1993 | The Adelie Corporation |
| Cambridge, Massachusetts | |
| Acting CEO |
| 1988-1990 | Cambridge Parallel Processors |
| Cambridge, MA | |
| President and CEO |
| 1963-1966 | New England Education Data Systems, |
| Harvard University, Graduate School of Education, M | |
| Cambridge, MA | |
| Director of Research and Development |