Prior to Haber's retirement in 2001, he was the managing partner at Hardesty & Hanover, having worked for the firm for 48 years, 29 of which as a partner. Some of his major design projects included the Cross Bronx and portions of the Long Island Expressways, the Henry Hudson Parkway reconstruction and portions of Interstate 80 in New Jersey.

Hardesty & Hanover (H&H) is a renowned engineering firm with 120 years of experience delivering comprehensive solutions to some of the most unique engineering challenges. With 11 offices worldwide and over 250 employees, Hardesty & Hanover delivers structural, mechanical, electrical and civil engineering services to a variety of clients and markets around the world, including complex bridges, roadways and expressways, tunnel systems, railroad structures, power distribution systems, and other heavy movable structures. H&H professionals, known industry-wide as experts in the complexities and coordination requirements for the structural-mechanical-electrical interfaces of movable structure work, manage projects from studies up through construction inspection of various structures that include all movable bridge types, elevated railways, and retractable stadium roofs.