Founded by the Roberts family in Rockville, Maryland, in 1966, Roberts Oxygen Company remains an independent distributor serving customers across nine states. With 57 locations, the company is known for pairing regional availability with technical support for industrial and medical gas users, laboratories, and welding customers.
Keen Compressed Gas CoKeen Compressed Gas Co. supplies welding equipment and industrial and medical gases, with on-site dry ice production and related rental, repair, and delivery support. Founded in Wilmington as Keen Auto Parts in 1919, the family-owned company began selling acetylene and oxygen in 1928 and now operates 13 Mid-Atlantic locations with more than 140 employees. Its automated fill plant received ISO accreditation in 2019, the company’s centennial year.NEW CASTLE, DE
CGI International CorporationFounded as a welding company in 1948, CGI International Corporation has grown into a third-generation Zullo family business that manufactures and distributes hydrogen, carbon dioxide, and other industrial and residential gases. Based in Washington, Pennsylvania, it operates as one of the largest independent gas suppliers in the Northeast and Mid-Atlantic, with distribution reaching 18 states. CGI also launched the first privately held hydrogen production facility in the United States during the 1980s and remains closely tied to emerging low-carbon energy markets.WASHINGTON, PA
GC Medical Equipment Company IncFounded in Peninsula, Ohio, in 1993, GC Medical Equipment Company has grown into a regional medical-gas supplier and respiratory-equipment service center. It supports healthcare providers across Ohio and neighboring states, with a focus on timely, cost-effective service for patient care.PENINSULA, OH
Monumental Supply CompanyStarted by Robert Kirchner in 1950, Monumental Supply Company has served industrial customers across the Mid-Atlantic for decades. Based in Baltimore, the company is known for practical expertise, a large local inventory and responsive delivery support, including service outside normal working hours. It also supplies elevator contractors across the region and the East Coast.BALTIMORE, MD