AUBURN — Jonathan Sirois of Gray has joined the general contracting firm of H.E. Callahan Construction Co., 2664 Turner Road, as a project manager. Sirois is a certified professional contractor and project management professional with 10 years of construction management experience.

Sirois is a graduate of the University of Maine, Orono, and most recently worked out of Virginia on projects for the Pentagon, the U.S. Navy and the U.S. Air Force.

H.E. Callahan Construction Co., in business since 1948, has extensive experience in commercial, health care, educational and municipal projects, including the Portland Public Market and the Auburn Public Library.