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
The McAlear GroupFamily-owned and operated since 1962, The McAlear Group is a U.S. manufacturer whose companies make garage-door products and drain-cleaning equipment for customers across the country. Founded around Service Spring Corporation in Toledo, the group now brings together several divisions under fourth-generation family leadership, with manufacturing and service operations spanning 18 U.S. locations. Its identity remains closely tied to American production, long-term customer relationships and community service.MAUMEE, OH