1. Research biologist in the Central Research and Development Department, E. I. du Pont de Nemours & Co., Wilmington, Delaware 19898
2. Planning consultant in the Central Research and Development Department, E. I. du Pont de Nemours & Co., Wilmington, Delaware 19898
3. Research manager in the Central Research and Development Department, E. I. du Pont de Nemours & Co., Wilmington, Delaware 19898
4. Director of life sciences in the Central Research and Development Department, E. I. du Pont de Nemours & Co., Wilmington, Delaware 19898