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J & S Instruments, Inc. is a Springfield, Ohio engineering company known for building turnkey data acquisition systems around the needs of a particular monitoring mission. It assembles, wires, tests and burns in each system for at least 48 hours before shipment, while also supporting instruments with NIST-traceable calibration.
Founded by Jackie Smith Jr. in Columbus, J Merrill Publishing is an independent publishing house built around keeping authors visible in the work they create. Its author-first approach gives writers professional guidance while preserving their ownership and voice, and the company has grown a catalog of more than 125 titles.
Built from a dirt-floor garage in Marion, Ohio, J-Lenco has produced sand cores for ferrous and non-ferrous foundries since 1968. The family-owned and operated company now makes cold-box cores for prototype through high-volume work, including a former run of roughly 20,000 rotor cores per day for Kelsey-Hayes. J-Lenco also produces ASTM-standard test cores and maintains traceable quality controls on each mix.
J. Rettenmaier USA LP manufactures insoluble fibers at its Schoolcraft, Michigan operation. Its fibers are produced from sustainable raw materials, including grains, fruits, vegetables, seaweed and trees, as well as upcycled post-consumer and recycled pre-consumer materials, and are used across the industries the company serves.
Founded in 1945, J.A. McMahon is a family-owned steel fabricator in Niles, Ohio, known for generations of experience and long-term customer relationships. Its AISC-certified operation produces structural steel for commercial and industrial projects, with a 32,000-square-foot facility supporting work from coordination through delivery. The company also established a civil engineering scholarship at Youngstown State University.
Since its founding in 1900, J.C. Whitlam Manufacturing has remained an independent, family-owned Ohio business known for its long-standing role in the plumbing industry. Now operating under fifth-generation family involvement, the Wadsworth company applies its chemical-engineering experience to products used by plumbing and related trade professionals worldwide.
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Founded in 1983 by former Navy Commander John F. Taylor Sr., J.F. Taylor has grown from a one-person operation into a defense engineering company with more than 500 employees. Based in Southern Maryland, it supports military customers with high-fidelity flight trainers and integrated mission systems, while its 2025 acquisition of Bugeye Technologies expanded its presence into Union, Missouri. The company maintains AS9100D and ISO 9001:2015 certifications.
Founded by former Navy Commander John F. Taylor in 1983, J.F. Taylor designs and manufactures military simulation, avionics, aircraft-modification, and ground-based systems. The company has grown from a one-person operation into a 500-plus-employee defense manufacturer, with 280,000 square feet across ten Southern Maryland facilities and an added Union, Missouri operation through its 2025 acquisition of Bugeye Technologies. Its quality system is certified to ISO 9001:2015 and AS9100D:2016.
Started in the Burns family garage in 1976, J.H. Burns Inc. (BMS® Burns) supplies mold-building products, plastic-processing equipment, and maintenance supplies to the plastics industry. The Medina, Ohio company has grown into a global distributor while retaining its founder Jim Burns’s emphasis on customer service and getting the job right the first time. BMS® Burns is ISO compliant and supports customers with custom mold-base machining as well as application-focused product guidance.
Founded in Sandusky in 1919 as the Sandusky Packing Company, J.H. Routh Packing Company produces fresh, smoked, and processed pork under the Daisyfield brand. The company sources hogs from independent family farms within 200 miles of its facility and added its ultra-premium Oak & Ember heritage Duroc line in 2024. Now owned by the Holden and Kalmbach families, J.H. Routh continues to serve customers across the United States and beyond with a century of pork-processing experience.
In business since 1976, J.K. Grinding Inc. is a long-established Buena Park job shop known for precision work and fast turnaround. Its employees each have at least 20 years of experience, serving Orange County and surrounding areas with internal and external grinding for both one-piece jobs and production runs.
Born from Jack Maas Sr.’s 1960 Cincinnati-area butcher shop, J.T.M. Food Group now makes fully cooked frozen foods and culinary solutions for foodservice, schools, retailers, and the military. Still family-owned and operated, the Harrison-based company carries its butcher-shop roots into a 100-million-pound annual production operation, with four generations of Maas family involvement. J.T.M. is especially distinctive for combining large-scale food processing with custom menu development and kettle-crafted sauces, soups, and fillings.
J&I Duct Fab is a first-generation, family-owned company founded by Gerald Miller after more than four decades in the mechanical and HVAC industry. Based in Covington, Ohio, the company employs approximately 20 people and is now led day to day by second-generation President Hannah Murray, while Miller remains CEO. Its faith-driven, employee-centered culture also extends into J&I Gives, a program launched in 2023 to support local communities and missions.
J&L Precision Manufacturing is a Brooklyn Heights, Ohio manufacturer known for supporting demanding industrial work with custom metal components. Its engineers and metallurgists help customers in fields such as defense and medical manufacturing select suitable materials and develop parts that meet exact project requirements. The company is ISO 9001:2015 certified and holds Cage Code 98NF7.
Since 1976, family-owned J&N Distribution & Design has designed and built custom cabinetry and woodwork for homes throughout the Cincinnati area. Its Lebanon showroom combines stock and custom cabinetry, with specially milled and finished work available when a project calls for a more tailored fit. The company has earned multiple HOMEARAMA accolades and provides design services for remodeling, new construction, and home renovations.
Founded in 1982 from two machines in an unfinished Lodi, Ohio barn, family-owned J&O Plastics now custom injection-molds plastic products for consumer, medical, agricultural and industrial customers. The Rittman manufacturer is one of the few U.S. companies to injection-mold straight PET, using a proprietary process to produce clear, durable and BPA-free parts. With more than 200 employees across two Ohio locations, J&O also handles assembly and is certified to ship directly to major retailers.
Family-owned and operated since 1999, Jabco & Associates blends powder and liquid industrial and janitorial cleaners in Amelia, Ohio. The company grew from a local janitorial-cleaner manufacturer into a custom blender for customers with their own formulations, with Ron Dierig’s family legacy continuing through owner and president Jan Spicer and the Spicer family team. Its in-house lab tests products during production, while its Cincinnati-area location supports quick shipping and regional distribution.
For more than 50 years, JAC Products has been known for turning a simple 1970 load-carrier concept into a global automotive supplier. The Pontiac-based company develops roof carrier systems and functional exterior trim for international vehicle manufacturers, with operations spanning four continents and service for more than 20 OEMs.
Jack Manufacturing operates a manufacturing facility in Bedford, Ohio and supplies industrial-grade commercial products nationwide, including degreasers, lubricants, pesticides, janitorial products, custom and specialty chemicals, metalworking fluids, compounds, hand cleaners, and wipes.
Family-owned and independent since 2007, Jackie O’s Pub & Brewery makes beer in Athens, Ohio, where traditional brewing methods meet an experimental barrel-aging and mixed-fermentation program. Its beers are shaped by the Athens community, from local fruit and honey to spent grain reused in the company’s Bakeshop, while solar power and other sustainability efforts are built into the brewery’s operations. The business has grown from its original brewpub into a regional brewery with locations in Athens and Columbus.