What lies below
is what lies ahead

With over 90 years of superior service, Specialty Granules (SGI) is a leading aggregates and mining company supplying specialized products to the North American building materials industry. Headquartered in Hagerstown, Maryland, SGI has four production plants strategically located across the U.S. SGI is committed to serving its customers’ needs with industry-leading R&D, innovative products and high-touch service.

SGI is the market-leading provider of roofing granules in the United States

Our Leadership Team

Justin Dunlap
Matthew McClure
Vice President, Roofing Operations
Damean Speck
Vice President, Finance
Daniel Rardon
Senior Director, Research & Development
Timothy Dull
Senior Director, Human Resources
Jason Clark
Senior Director, Innovation and Sustainability
James (Mike) Cahill
Senior Director, Manufacturing
Douglas Cechovic
Senior Director, Business Development - Roofing