Jack and Marie Callahan established John T. Callahan & Sons, Inc. in 1954 and eventually all five of their sons came into the family business after college. The company was founded on the principle that honesty, service, and care for customers would establish a successful company. Over the next 25 years the company grew steadily, servicing notable clients across the East Coast. That legacy and those principles live on in Callahan Construction Managers and today these values touch every part of our business, from building deep relationships with our clients, to supporting the professional growth of our employees. Top quality work, and a commitment to treating our employees, subcontractors, and clients like family. It’s how we’ve built our reputation as a leader in the industry, and it’s the foundation that will carry us forward.