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, Vice President Finance & Administration
Paul Mullaley, Vice President / Project Executive
Tom Zimmerman, Controller
Doug Morrison, Project Executive / Senior Project Manager
Steve Carley, Project Executive
Bob Sanda, Civil Engineer
Steve O'Reilly, Safety Officer

Ian Carpenter, Chief Estimator
Frank DiCenso, Senior Estimator
Dave DuPuy, Director of Subcontractor Relations
Thomas Otey, Director of Business Development
Tina Visalli, Marketing Manager / Office Manager
Shauna McDonough, Contract Administrator
Guy McDonough, General Superintendent