Family-owned Hamilton Associates is a portfolio of three manufacturing and industrial businesses, producing and supporting products for critical applications with customers around the world. Its companies make elevator guidance equipment, clean-air testing instruments, and professional pressure-washing equipment, giving the Owings Mills group an unusually broad reach across specialized markets. Hamilton has maintained a long-term, independent ownership model and was named a Baltimore Sun Top Workplace for six consecutive years through 2025.
McHenry Pressure Cleaning SystemsSince 1984, McHenry Pressure Cleaning Systems has built its reputation in Frederick as a local, hands-on industrial cleaning partner for businesses across the Mid-Atlantic. The company designs and supports custom wash systems for operations such as fleet maintenance and food manufacturing, with factory-trained technicians providing service even on equipment it did not sell.FREDERICK, MD
Better Engineering Mfg., IncFamily-owned and American-built for more than 60 years, Better Engineering traces its roots to two World War II veterans whose patented Torque Converter Flusher launched the business in 1960. Today, the Hiss family’s third generation carries that legacy forward from Joppa, Maryland, where the ISO 9001-certified company builds custom industrial parts washers for manufacturers and regulated processing operations.BALTIMORE, MD
3R Sales & ServiceSince 1995, when Paul Middlecoop purchased the business, 3R Sales & Service has grown from a 3,000-square-foot shop with four pressure washers into a 39,000-square-foot operation with more than 125 machines in stock. Now owned by Jamie and Shannon, the veteran-owned company serves cleaning contractors from Ohio and a second location in Bushnell, Florida, while its experienced technicians provide equipment support and custom mobile wash builds.CUYAHOGA FALLS, OH
RAMCO Equipment CorporationRAMCO Equipment Corporation is a family-owned manufacturer of immersion parts washers and parts-washing systems, a business it says has continued for more than 90 years and through three generations. The company began as a small welding shop in Manhattan and has built immersion washing systems since the 1940s. Its systems are designed for cleaning applications ranging from general washing to demanding precision cleaning, using aqueous detergents or alternative solvents.GIBSONIA, PA