Joseph B. Callaghan, Inc. is a structural engineering firm that is driven by the challenges of the built world. We are committed to providing innovative solutions to Clients at every stage of the structure’s life, from the design of new construction to rehabilitating existing facilities. Our staff is involved in all phases. What set us apart are our established relationships, reliability and response with our Clients. We are a certified Small Business Enterprise (SBE) in Pennsylvania and New Jersey.