P.J. “Pat” Calabrese, longtime president of The Grieve Corporation, died Feb. 17, 2018, in Lake Forest, Ill., at the age of 90. Calabrese served as president of Grieve, a manufacturer of industrial ovens and furnaces, from 1968 until his retirement in 2008. He worked closely with the company’s founder, Price Grieve. Calabrese’s son Frank is currently Grieve’s vice president of sales and marketing.

Calabrese began his career at Grieve in 1958 as national sales manager before becoming president in 1968 and finally chairman in 2006. During his tenure as president, the company grew steadily to become a global supplier of heat-processing equipment for virtually every industry in every industrialized country in the world. 

Born in Chicago, Calabrese graduated in 1949 from the University of Illinois with a bachelor’s in mechanical engineering and was awarded that school’s prestigious Distinguished Alumni Award in 2001.