Mechanical engineer John F. Hennessy III, grandson of the co-founder of the 93-year-old consulting engineer now known as Syska Hennessy Group, died on Feb. 21, after a long illness. He was 65.
In 1989 when he was 33, Hennessy took over as chairman and CEO of Syska & Hennessy Inc. after his father, John F. Hennessy Jr., died suddenly of a heart attack. He remained in that role until 2004, growing the firm into new markets in the U.S. and globally.