Keller Engineers, Inc., provides quality engineering, surveying, and related services to public and private sector clients. We specialize in transportation, water and wastewater, land development, environmental, energy and structural engineering. We also provide geographic information systems (GIS), construction inspection and construction management, and grant writing services. Our staff members work closely with our clients during all phases of their project to ensure that the client obtains their desired end product. Our approach of project-centered rather than profit-centered engineering provides our clients with experienced engineers and technical personnel dedicated to achieving a successful end product. Keller Engineers, Inc. has office locations in Hollidaysburg, PA and State College, PA.