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Founded by Malcolm Steele in 1987, MS Welding is a Leeds-based welding equipment repair, servicing, calibration and sales centre supporting industry across Yorkshire and the UK. Its engineers repair most makes to component level in a purpose-built facility, while the business also designs bespoke automated welding systems and serves as an authorised Hypertherm service centre and approved EWM service centre. Malcolm’s engineering legacy continues after his death in 2023 through the company’s repair, training and technical support work.
Born from a 1970 military testing project at New Mexico’s White Sands Missile Range, MSD Ignition makes high-performance ignition and engine-control components for racers, hot rodders and enthusiasts. The company pioneered capacitive-discharge and Multiple Spark Discharge technology, and now manufactures at a more than 150,000-square-foot El Paso plant staffed by over 275 people. MSD products run everywhere from 12,000-horsepower Top Fuel dragsters to street rods, farm trucks and boats.
Formed through the merger of three established co-packagers, MSI Express is a single-source contract manufacturer and packaging company serving consumer packaged goods brands. Its 16 facilities across six states encompass about 3 million square feet of manufacturing and warehouse space, giving customers a broad operating network for everything from dry-food blending to specialized gummy production. MSI Express also integrates engineering, digital supply-chain tools and food-safety systems, and was named Manufacturing Technology Insights’ 2025 Contract Manufacturing Packaging Company of the Year.
Mt. Eaton Pallet manufactures pallets in Ohio Amish Country, where it combines a local Amish workforce with modern technology. Founded in 1991 by Dwain Schlabach, the company is now owned and operated by Nathan Miller, who joined in 2016. It reports producing 850,000 pallets annually and specializes in custom pallet manufacturing.
For almost 30 years, MTAG Switzerland has engineered equipment and integrated solutions for secondary metallurgy and other demanding stages of steel production. Its main expertise is vacuum degassing of liquid steel using dry mechanical pumping systems, with installations designed for ladle capacities from 5 to 300 tonnes. Based in Switzerland and part of Dutch ABBC Group BV, MTAG works internationally on customized projects from concept through commissioning.
From a Dayton basement job shop to an international shooting-sports brand, MTM Case-Gard makes molded cases, ammunition storage and related accessories for hunters and range users. Founded in 1968, the family-owned company still manufactures its products in Dayton, where six of founder Bill Minneman’s children work full-time alongside a 75-member team. MTM says its 325-plus accessories are developed around problems its employees and customers encounter, and its products now reach 108 countries.
Founded in 2019 by Dave Miller, Muddy Creek Engineering is a Cincinnati-area consulting company shaped by his 30 years in patternmaking and moldmaking. Miller draws on that shop-floor background to help foundries and molding firms turn incomplete or legacy information into workable 3D designs.
Since 1932, Mueller Art Cover has manufactured loose-leaf ring binders and small-format binders in the USA. The company is known for heat-sealed vinyl covers that can be customized with features such as pockets and imprinted branding, alongside its clear-pocket View Binders.
Mueller Electric, founded in 1908 by alligator-clip inventor Ralph Mueller, manufactures electrical clips, custom cable assemblies and related components from its Akron base. Still an American manufacturer after more than 115 years in Northeast Ohio, the company’s products include the battery-charging clips and test connections that grew from its original invention, alongside custom assemblies for industrial and OEM applications. Its Akron-made products include instrumentation cables, test leads, terminals and temporary protective grounding equipment.
MugLugger is Mike Gorman’s Piqua, Ohio venture, born from his family’s experience with disability and reshaped during his own rehabilitation after a serious 2014 illness. He makes a securely attached cup holder for people using mobility aids, with production and packaging carried out entirely in the USA.
Founded by Cleveland hospital colleagues Devon and Nina, Mugsy Bakes makes single-serve mug cake and cookie mixes that turn a dessert craving into a warm treat in under two minutes. The women-owned company builds its “not a baker” identity around easy, no-oven preparation, while keeping every mix gluten-free and dairy-free. Its mixes are made in a dedicated gluten-free, dairy-free, soy-free, and peanut-free facility.
Mule Labs, LLC is a hands-on engineering practice led by a problem solver with eight years of experience working both independently and on cross-functional teams. It helps clients turn project ideas into reliable embedded hardware and software, with particular attention to clear documentation and practical solutions.
Mullwoods manufactures residential cabinetry, commercial casework, and cabinetry components in Millersburg, Ohio. The family woodworking business traces its roots to Jake Mullet’s custom-cabinetry work in 1959; Mullet Cabinet and Fryburg Door combined as Mullwoods in 2024. The company serves homeowners, builders, contractors, and cabinet and furniture shops, with a history of custom cabinetry and component production.
Founded in 1916 as Franklin Development Company, Multi-Color Corporation has more than a century of experience in label printing and produces labels and packaging solutions for brands worldwide. The company developed in-mold labeling in the 1970s and now supports customers from concept through commercialization, with global operations headquartered in Atlanta, Georgia.
Since John Parsio Sr. incorporated Multi-Plastics in 1979, the company has grown from a one-slitter Columbus operation into a global film manufacturer with a distinctly vertically integrated approach. It now supports packaging and related manufacturers through in-house extrusion, converting, and distribution, with facilities across North America and England.
Founded in Denmark in 1938, Multi-Wing Group A/S designs and manufactures axial fans and impellers, building on a heritage in aerodynamics and modular impeller expertise. It has grown from serving small Danish business customers into a global company with local presence, supplying airflow products for demanding applications around the world.
Established in 1983, Multilink, Inc. is an Elyria manufacturer known for keeping telecommunications product development and production under one northeast Ohio campus. The company serves broadband operators and transportation agencies worldwide, with an ISO 9001-certified operation that takes projects from engineering through final assembly and testing.
MultiPlast Systems develops customized packaging and sustainable additives, including its proprietary BEDA® formulation, which is designed to accelerate plastic degradation in landfill environments. Established in 1999, the company supplies flexible packaging solutions through both domestic and imported production, with experience serving hospitality companies since 2002. BEDA® products have been independently tested and certified under ASTM D5511 and D5338 methods.
Formerly known as Denison Multipress, MULTIPRESS has spent more than 75 years designing and manufacturing custom hydraulic presses in the USA. Now operating from Pacific Press Technologies’ 130,000-square-foot headquarters in Mount Carmel, Illinois, the company combines in-house engineering with USA-based parts and service support to build presses around demanding production requirements.
Founded in 1996 and headquartered in Mentor, Ohio, MUM Industries manufactures protective electrical enclosures through its brands Integra Enclosures, StrongBox and EMF Company. Its portfolio ranges from polycarbonate and stainless steel enclosures to custom sheet-metal cabinets, with six locations supporting customers across North America, Europe and Asia. MUM Industries is ISO 9001:2015 certified and joined with EMF in 2021 to broaden its manufacturing capabilities.