GZA has elevated Patrick Mahon to associate principal. He has been at the firm since 2002 and is based in New York City.

Leonard Strickland has joined Cardio as a business unit manager in the company’s northern region and is based in Burlington, N.J.

Rich Rappa, senior vice president and market leader of manufacturing and energy at CHA Consulting Inc., Albany, N.Y., was named the Northeast region Energy Engineer of the Year by the Association of Energy Engineers, which represents 17,500 global professionals in energy engineering and management fields. He is cited for his work in energy efficiency.

Pennoni announced the promotion of Todd Hay to regional vice president. He had been associate vice president and Newark office director.

Michael J. Conaboy has been named to the newly created position of area executive, NY-NJ, in the Northeast region of Michael Baker International. With the firm since 1994, he had been vice president and office executive in New Jersey, based in Hamilton and Newark.

Perkins Eastman promoted Maureen Carley-Vallejo and Joanne Violanti to principals. They are based in New York City.

MacLaren Engineering Group promoted Jeremy D. Billig to vice president and New York City regional director. He has been with the firm since 2005.

Christopher Behan, Alyson Sikorski and Chok-Pan Wong have been elevated to principals of GACE Consulting Engineers.