Manufacturer Directory
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MD
Since 1969, M&M Carnot has designed, manufactured, installed, and serviced industrial and commercial refrigeration systems and controls built around natural refrigerants. The North American company is particularly known for developing the standard for large ammonia/CO2 cascade systems and for more than 15 years of experience with transcritical CO2 refrigeration. Now a product line of Johnson Controls, M&M Carnot also provides refrigeration controls for facilities ranging from cold-storage warehouses to ice rinks and data centers.
MAC Metal Fabrication is a Maryland-based shop known for serving telecommunications contractors and tower installers across the Northeast. Its experienced fabricators provide custom structural work and turnkey support for projects ranging from tower extensions to equipment platforms, with welding performed to AWS D1.1 requirements.
Founded by CEO Guru Ramu in 2018, Mach33 Engineering turns aerospace ideas into engineered prototypes, fabricated components, and instruments for space missions. The Beltsville firm has supported NASA Goddard projects including the Mars Organic Molecule Analyzer and Dragonfly Mass Spectrometer, while also applying its design and manufacturing work to practical needs such as low-cost breathing devices during the COVID-19 pandemic.
MacPack LLC specializes in hazardous-materials packing and custom crating, with a mobile team that can bring its packing operation to facilities across the country or overseas. Based in Baltimore, the company’s management has more than 40 years of combined packing and transportation experience, and its trained employees are TSA-approved and certified to handle dangerous goods. MacPack is also a Certified Screening Facility and an accredited provider of export wood packaging compliant with ISPM 15.
Since 2013, Macro Dental Lab has been shaped by master technician Richard J. Shin, who brings more than 35 years in dental laboratory work to a locally operated Jessup, Maryland shop. The lab serves dentists throughout the DMV, completing every case in-house rather than outsourcing the work, with a particular reputation for its titanium partial dentures.
Founded in Annapolis, Made+ designs and produces American-made performance footwear, apparel, and accessories for movement from the Chesapeake Bay to everyday life. The vertically integrated brand grew from a vision to reimagine footwear manufacturing, keeping design, development, and production close at hand while using recycled materials and responsible sourcing. Its Annapolis retail store also serves as a hub for customization, sustainability, and community.
Since 1993, women-owned and operated Madison Avenue Inc. has produced custom signage and visual branding for meetings and events from its headquarters in Columbia, Maryland. Its made-in-USA work includes the reusable EDGE SMARTsign®, an in-house-developed-style solution that lets organizers replace event messages instead of discarding entire signs, alongside graphics and branded materials for corporate and nonprofit clients. The company’s production and operations remain in the United States, with design and project management handled in-house.
Known for operating at the tactical edge, MAG Aerospace is a U.S. Government prime contractor supporting defense missions around the world. The Fairfax-based company operates more than 200 manned and unmanned platforms and has built and operated 45 operations centers across six continents. Its aircraft work includes an FAA Part 145 Repair Station and more than 35 FAA Supplemental Type Certificates.
Magee Technologies, LLC (MTech) designs, analyzes, certifies, and manufactures aerospace structures for commercial and Department of Defense customers. Its engineers bring more than 135 years of combined experience across over 50 aerospace platforms, while its Maryland operations now include nearly 23,000 square feet of manufacturing space for rapid prototyping and aircraft work. MTech’s aerospace quality system is certified to ISO 9001:2015/AS9100.
Magma Build Studios is a custom fabricator of architectural finishes, furniture, lighting, and art. Its stated offerings include architectural and interior work, furnishings and decor, decorative lighting, glass faucets, and art fabrication.
Since 1987, Magnum Products has manufactured drywall joint compounds and related finishing materials for professional drywall applicators. With plants throughout the United States, the company formulates products for local climate and job conditions while retaining samples and testing every production batch in its laboratories. Magnum is also the maker of Level Coat, a spray-on system developed to achieve a Level 5 drywall finish and reduce joint shadowing under strong lighting.
Founded in 2016, Maiden Biosciences is a U.S.-based small biotechnology company that distributes prescription-only collagen topical dressings for wound and post-surgical care. Its dressings use structurally intact collagen, formulated to absorb wound exudate while maintaining a moist environment, with both sheet and powder formats available for different applications. The company is located in an economically diverse HUB zone and offers products with a stated 10-year shelf life.
Founded in New Cairo in 2019 by physicians, pharmacists, and business leaders, majestic Biopharma develops pharmaceutical and cosmeceutical healthcare solutions. From its Egyptian base, the company has grown to more than 500 employees, 16 brands, and a presence in more than 26 countries, with research-backed care spanning therapeutic and dermatological needs. Its portfolio is produced under GMP and ISO-certified quality standards and includes the hair-care brand Capixy and UK-formulated skincare line Vacation.
Owned and operated by longtime friends Nancy Wingo and Gail Jones, Majestic Document Holders makes custom presentation materials for diplomas, certificates, binders and other important documents. The Woodbine, Maryland, business is a certified MBE/DBE/SBE woman-owned small business, and its products are made in the USA. Wingo and Jones work directly with clients from design through delivery, including rush and unusual-size projects.
Gaithersburg-based Makara Builders, LLC is known for focusing its work on accessory dwelling units throughout the Washington, D.C., Maryland, and Virginia region. The company serves homeowners seeking additional space while also working as a total small business on federal and local government construction projects.
Makers Woodshop is a Maryland custom wood manufacturer and sawmill producing made-to-order furniture, architectural woodwork, bar tops, kitchen islands and counters, shelving, mantels, wall art, slabs, and dimensional lumber. The company mills, dries, flattens, sands, engraves, and finishes locally sourced Maryland hardwood in-house for residential, commercial, and hospitality clients.
With more than 40 years of combined manufacturing experience, Mama Vida is a Randallstown food maker known for fair dealing, close customer relationships, and support for emerging brands. It produces private-label and co-packed foods in small runs, hand-crafting recipes before using an automated bottling line for finishing.
Minority-owned and women-led, Mama’s Biscuits grew from former restaurateur Lesley Riley’s kitchen into a gourmet biscuit brand based in Germantown, Maryland. Drawing on Pennsylvania Dutch and Southern comfort-food traditions, it makes scratch-inspired biscuits and mixes with plant-based and gluten-free choices for home breakfasts, gatherings, and food-service customers. The company also supports local food access through its Feeding Faith initiative and provides blankets alongside biscuits to people experiencing homelessness.
For more than four decades, Man & Machine has built its identity around human-centered engineering for demanding workplaces. Founded by engineer Clifton Broumand, the Landover company grew from three employees in a small office to a 19,000-square-foot headquarters with its own production line, while earning ISO 9001:2015 certification. Its products are made for environments where infection prevention and rugged daily use matter, including healthcare and industrial settings.
Founded in 1987 by Marine Corps veteran A. Joseph Manning, Mann-Pak is a Baltimore-area, second-generation family-owned manufacturer of custom flexible packaging and printed shrink film. Its 8-color presses handle film and paper up to 48 inches wide, while in-house converting and equipment expertise support packaging projects from food and confectionery to industrial goods. Mann-Pak’s operation is SQF certified for food packaging and offers biodegradable and recyclable material options.