Adelbert T. Tweedie

Title: Chief Scientist & Chemist

Company: Devon Associates

Location: Kennett Square, Pennsylvania, United States

Adelbert “Del” T. Tweedie, Ph.D., Chief Scientist and Chemist at Devon Associates, has been recognized by Marquis Who’s Who Top Scientists for dedication, achievements, and leadership in chemistry.

Dr. Tweedie commenced his illustrious career as a research chemist at Dow Chemical Company in Midland, MI, in 1956, holding this position for two years. As a celebrated scientist, chemistry came naturally to him as his father was a high school chemistry teacher. He subsequently served as a research chemist at Aerojet-GenCorp in Azusa, CA, from 1958 to 1962 and a technology supervisor at Union Carbide Company in South Charleston, WV, from 1962 to 1964. Rising through the ranks, he then became a manager of the materials engineering space division of General Electric in King of Prussia, PA, from 1964 to 1986, which he considers to be the highlight of his career. This position allowed him and his employees to solve difficult problems in the construction of space crafts, which he thoroughly enjoyed. He was then promoted to chief scientist of the space division of General Electric from 1986 to 1988 before taking on his final role as chief scientist at Devon Associates from 1988 until his retirement in 1995.

Alongside his primary endeavors, Dr. Tweedie was on the national advisory committee of the National Aeronautics and Space Administration from 1980 to 1983, having previously served as state chairman of Common Cause in Pennsylvania from 1976 to 1978. In addition, he was chairman of the Kendall Crosslands Retirement Community. A longstanding member of the American Chemical Society and the American Institute of Aeronautics and Astronautics, he has contributed myriad articles to professional journals throughout his career and was the author of “It Takes a Rocket Scientist” in 1992.

Dr. Tweedie holds a Bachelor of Science in chemistry from the University of Michigan and a Doctor of Philosophy in organic chemistry from the University of Illinois. A former captain of the Chemical Corps in the United States Army, he has been highlighted in the 23rd edition of Who’s Who in the East, published in 1990. Married to Sally A. Bersey since 1953, he is the proud father of three children, three grandchildren, and five great-grandchildren. In his spare time, he enjoys working in the woods, building rustic furniture and traveling the United States by boat.

For more information, please visit: 

Lifetime Achievement 

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