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MD
Founded as a Baltimore family business in 1980, Riverside Printing produces printed materials and branded products for Maryland businesses and organizations. The company became formally incorporated in Pasadena in 1994 and is now run by second-generation owner Ryan Cole, who has expanded its original paper-printing focus to include signs, apparel and promotional products. Riverside is known for keeping a personal, local approach while supporting long-standing customers, including some served for more than 25 years.
From its Salisbury, Maryland base, Riverton Marketing and Printing helps organizations tell their stories through printed materials, promotional products, and brand design. The full-service team works directly with clients on projects ranging from marketing pieces to custom apparel and vehicle graphics, supporting both supplied artwork and in-house design. Its portfolio includes work for local businesses such as KSES, Authority Refrigeration, and Singh Operation Services.
RJ Uniform carries forward a Baltimore uniform-making tradition rooted in A. Jacobs and Sons, established in 1891, and F. and F. Uniform Company, founded in 1946 by World War II veterans Yale and Ralph Friedlander. The companies merged in 1957, and the resulting business now serves public-service agencies with uniforms, including custom-made military uniforms and agency-specific apparel.
RNC-CO Conveyance Company designs and manufactures bulk material-handling equipment, with a focus on en-masse chain conveyors, bulk-flow conveyors and bucket elevators. Serving operations across North and South America, the company combines decades of hands-on engineering, installation and maintenance experience with custom designs for facilities with demanding throughput or tight spatial constraints. Its bucket elevators can reach capacities of up to 60,000 bushels per hour, while its support extends from CAD development through retrofits and ongoing troubleshooting.
Founded in 2001, locally owned and operated Road Safety LLC provides traffic-control services and supplies from Glen Burnie, including an in-house Maryland-certified sign shop that fabricates and installs MUTCD-compliant signage. Serving Maryland and surrounding Mid-Atlantic states, the company combines Maintenance of Traffic work, smart work-zone support, and pavement-marking services with more than 75 years of combined management experience. Its certifications include MDOT MBE/SBE, Baltimore City WBE, and WMATA SBE status.
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.
Chartered in Maryland in 1985, Robotic Technology Inc. is a Washington, D.C.-area technology company known for its work on intelligent vehicles and systems for public-sector and commercial clients. Since 2003, it has managed the DARPA-sponsored Intelligent Vehicle Technology Transfer Program, helping move autonomous-vehicle research between defense and transportation communities.
Founded by Otto Roboz in 1953, Roboz Surgical Instrument Co. designs and supplies hand-finished surgical instruments and related equipment for biomedical and life-science research. Its catalog now spans more than 1,000 products, including fine micro-dissecting tools and Genuine Dumont forceps, used by healthcare and research professionals worldwide. Roboz also provides instrument care services such as color coding, extending a research-instrument specialty that has lasted more than six decades.
Known for preserving semiconductor supply after original manufacturers discontinue parts, Rochester Electronics is an authorized source serving equipment makers with long operating lives. From its Newburyport base, the company supports those customers with semiconductor manufacturing and replacement programs, including licensed production for obsolete devices. Its U.S. facilities span more than 245,000 square feet and are registered under ITAR.
Founded in Rochester in 1888 as Rochester Germicide Company, Rochester Midland Corporation makes specialty chemical products and provides technical services for customer operations. Its history includes manufacturing hand soaps and cleaners, and it now positions itself as a performance partner in water management, food safety, and facility hygiene. The company reports an ISO 9001:2015-certified quality management system.
Founded in 1987 by Master Blacksmith Clayton H. Miller, Rock Ridge Forge LLC is a family-owned Jarrettsville shop that designs and fabricates custom architectural and ornamental ironwork. The Miller family works with clients from drawings, photographs, or samples, creating pieces for residential and commercial settings and restoring older metalwork in a drive-in sandblasting bay. Son Logan joined the business as an apprentice after college, carrying the family’s blacksmithing tradition into its next generation.
Since 2004, Rock Tops Fabrication has turned stone slabs into precisely fitted custom surfaces at its showroom and fabrication shop in Owings Mills, serving homeowners and trade professionals across greater Baltimore. The locally owned company pairs digital templating and CNC cutting with hand inspection, and is particularly known for waterfall end panels and mitered edge profiles. Its work spans residential spaces and prominent Maryland commercial projects, including the Maryland Governor’s Mansion and Johns Hopkins facilities.
Founded in 2006 by New Zealand engineer Sir Peter Beck, Rocket Lab grew from a small-launch pioneer into a global space company headquartered in Long Beach, California. It is known for Electron, the rocket that established its track record of delivering customer payloads to orbit, and now helps commercial, civil and defense organizations carry out space missions from launch through satellite operations.
Founded in 2006 by engineer Sir Peter Beck, Rocket Lab is a Long Beach-headquartered space company that designs and manufactures rockets, spacecraft, satellite components and space systems while providing launch and on-orbit mission services. Its Electron small launch vehicle has delivered more than 200 satellites to orbit, while the company develops the reusable Neutron medium-lift rocket and operates launch sites in New Zealand and Virginia. Rocket Lab also manufactures space solar power systems in Albuquerque and spacecraft in an 11,000-square-foot Long Beach cleanroom, giving it an unusually vertically integrated path from mission design to orbit.
Veteran-owned Rocket Shop LLC keeps critical facilities running with industrial welding, boiler work, pressure-vessel repair and mechanical field services from its Maryland fabrication facility. Backed by decades of hands-on trade experience, the company is a National Board R-Stamp certified repair organization with mobile capabilities serving healthcare, pharmaceutical, government and industrial customers across the Mid-Atlantic and nationwide. Its specialty includes restoring autoclaves and sterilizers as well as handling difficult shutdown and emergency repairs.
Created by a collective of abrasive specialists, RockRidge Abrasives supplies hand-selected and thoroughly tested materials for blasting, waterjet cutting and surface finishing. The company is particularly focused on premium garnet, pairing its abrasive media with waterjet replacement parts and application knowledge to help customers improve cutting performance. RockRidge serves customers through dozens of distributor locations across the United States and Canada, and its blasting garnet is backed by SSPC-AB1 certification and CARB approval.
For more than 40 years on Rockville Pike, Rockville Printing and Graphics has produced commercial print and marketing materials, pairing presswork with design, mailing, and finishing services. The Rockville shop handles projects from large copy jobs to direct-mail campaigns and can carry a mailing from design through delivery to the post office. Its in-house approach also includes letterpress work and environmental practices such as recycling substantial amounts of paper and using biodegradable inks and toners.
Founded in Baltimore in 1919 by Harry Goodman Roebuck and his son, Charles, Roebuck Printing produces commercial publications such as catalogs, tabloids and magazines. The four-generation family-run company helped pioneer commercial web offset printing in Baltimore and now operates from a modern White Marsh-area facility with prepress, printing, finishing and distribution under one roof. Its history also includes an early role in school yearbook printing and a continuing investment in newer printing technology.
Rohde & Schwarz provides electronic manufacturing services alongside the development and manufacture of high-tech products, giving customers a single-source partner for complex electronics. Its EMS offering draws on decades of experience in electronics and the company’s vertically integrated capabilities.
Founded in 1993 by two coal miners, Rohmac, Inc. is a West Virginia manufacturer shaped by firsthand underground mining experience. The company is known for designing practical equipment that addresses difficult mine-site problems, especially where confined spaces or demanding conditions make conventional machinery unsuitable. Rohmac serves mining customers with purpose-built machines and repair support.