Who we are

G&A has locations throughout eastern Pennsylvania and employs over 175 professionals and staff companywide. We have grown in a carefully planned fashion along with the growth of the region by offering a wide variety of design, engineering, and consulting services and successfully representing over 75 local municipalities/authorities. The Firm continually ranks as one of the top regional engineering and consulting firms by the Philadelphia Business Journal, a success achieved by always trying to understand our clients, their needs, and working with them to a successful project completion.

For over a century of professional practice, G&A has instilled confidence and trust in our clients that we will meet the unique needs of every project. That experience has taught our firm the importance of responsiveness and the true value of teamwork. As a practice leader, we embrace our responsibility to provide environmentally and economically sustainable designs for our clients and the communities we serve. Our history feeds a philosophy that promotes resilient solutions to the complexities of an aging infrastructure. G&A goes beyond the traditional engineering and consulting firm, offering tailored solutions to our client’s challenges.

G&A is the successor to the original professional practice started by W.O. Weisel in 1918.  G&A’s founder and patriarch, Robert “Bob” Gilmore, R.S. developed a professional staff representing expertise in the fields of engineering, surveying, planning, and landscape architecture, offering “Creative engineering and planning for protection of our environment and conservation of our resources.” Bob later handed the reins of the firm’s leadership to his son, Steven D. Gilmore, P.E. who was instrumental in continuing the firm’s expansion for over 40 years, holding true the values and mission of the established legacy of high performance and excellence.

In 2017 Steve transitioned the role of CEO & President to Scott Muller, P.E., P.L.S. as part of the planned succession process culminating in the 100% employee owned firm.  Since that time Scott has honored the legacy established by the Gilmore Family while leading the firm to new and greater achievements.