Founded in 1969, Skelly and Loy, A Terracon Company (S&L) is headquartered in Harrisburg and has built a reputation for excellence delivering a wide variety of professional services, including mining, civil, and environmental engineering. We are proud to serve the communities in Eastern and Central Pennsylvania, as well as public and private sector clients across the U.S. and abroad.
S&L has 150 employees, serving clients from offices in Harrisburg, Pittsburgh, and State College, Pa.; Hagerstown and Baltimore Metro, Md.; and Morgantown, W.Va. S&L has built a reputation for excellence delivering professional services including mining, civil, and environmental engineering; National Environmental Policy Act (NEPA) compliance; natural resource management; wastewater permitting; noise and air quality investigations; hazardous waste management investigations and remedial design; industrial hygiene studies; archaeology and cultural resources; Geographic Information Systems (GIS); and water, wastewater, and remediation treatment systems.
As trends change and new markets emerge, we assess and expand our strong foundation to provide professional services best-suited to meeting the needs of our ever-changing world. For each project, personnel are carefully chosen to encompass the full range of expertise required to completely analyze each challenge and provide the best practical solution.
Our team in Harrisburg is ready to help with your next project.