| Date | Description |
| 1994-1995 | Quality Improvement Specialist with MAMTC, CSU |
| 1993- | Professor of Statistics at Colorado State University |
| 1990- | Co-director of the Center for Quality and Productivity Improvement, College of Business, Colorado State University |
| 1988 - 1993 | On leave from Colorado State University. Created Boardman Associates with Eileen C. Boardman to gain experience in consulting on improvement of quality. Prepared Workbook for Quality Improvement and Statistical Thinking. |
| 1983 - 1988 | Professor of Statistics and Consultant in the Statistical Laboratory, Colorado State University |
| 1982 - 1983 | Professor of Statistics and Professor-in-Charge of the Statistical Laboratory, Colorado State University |
| 1973 - 1982 | Associate Professor of Statistics and Professor-in-Charge of the Statistical Laboratory, Colorado State University |
| 1968 - 1973 | Assistant Professor of Statistics and Director of Biometrics Unit of Statistical Laboratory, Colorado State University |
| 1967 - 1968 | Instructor, Rutgers University (Experiment Station Statistician) |
| 1966 - 1967 | Lecturer, Rutgers University (College of Business) | 1965 - 1966 | Teaching Assistant, Rutgers University |
| 1964 - 1965 | Research Assistant, Rutgers University |
| 1963 - 1964 | General Electric Undergraduate Assistant, Bucknell University |