Callahan, Inc. is a full service construction firm specializing in construction management and preconstruction. Callahan's executive officers have extensive experience in the commercial construction industry and have worked with several large New England developers and property managers. Following are Key Personnel:

Dennis Sheehan, VP Finance & Administration
Paul Mullaley, VP / Project Executive
Tom Zimmerman, Controller
Doug Morrison, Project Executive
Steve Carley, Project Executive
Bob Sanda, Civil Engineer
Mark Schryver, Director Architectural Services

Steve O'Reilly, Safety Officer
Ian Carpenter, Chief Estimator
Frank DiCenso, Senior Estimator
Dave DuPuy, Director of Subcontractor Relations
Tina Visalli, Marketing Manager / Office Manager
Shauna McDonough, Contract Administrator
Guy McDonough, General Superintendent