Principal science Physical Science, Inc., Andover, Massachusetts, 1976-1978. Assistant professor, lecturer Indian Institute of Technology, Kanpur, India, 1978-1984. Principal science Rohm & Haas Morton International Chemical Vapor Deposition Inc., Woburn, Massachusetts, 1984—2005.
Distinguished scientist Dow Chemical Company Rohm & Haas, Marlboro, since 2005. Consultant Physical Science Inc., Andover, 1979-1980, Chemical Vapor Deposition Inc., Woburn, 1983, Sanders Associate, Nashua, New Hampshire, 1985-1986, Efficient Systems, Inc., Andover, 1987-1989.
- Achievements include patents for fabrication of lightweight ceramic mirrors by means of a chemical vapor deposition process, method of fabricating lightweight honeycomb type structure, selective area chemical vapor deposition, a triangular deposition chamber, highly polishable, highly thermally conductive Silicon Carbide, hard disc drives and read/write heads, chemical vapor deposition furnace and furnace apparatus, chemical vapor deposition produced Silicon Carbide having improved properties, precision replication by chemical vapor deposition, bonding of Silicon Carbide components Low Scatter high Quality Water-clear ZnS, Low Stress water-clear ZnS, Method to produce High Aspect Ratio Domes by Chemcial Vapor Deposition, Method for Producing Free Standing Silicon Carbide Articles, Method Producing Near-net Shape Free Standing Articles by Chemical Vapor Deposition, Silicon Carbide with High Thermal Conductivity, Wafer Holding Apparatus, Opaque Low Resistivity Silicon Carbide, Low Resistivity Silicon Carbide, Semiconductor Processing.