McMasters Koss Company History

Robert (Bob) McMasters

Robert (Bob) McMasters

University of Michigan – Bachelor of Business Adminstration 1959

Bob worked with Allis Chalmers, Parker Seal and rubber seal distributors in the Detroit Metropolitan area before starting the company in 1977.

Bob was President of the Red Run Golf Club, Golf Association of Michigan and Western Golf Association on his spare time culminating a long professional and personal devotion to the golfing industry and sport.

Martin (Marty) Koss

Michigan State University – Bachelor of Science in Mechanical Engineering 1965

Marty was a civil corps officer in the U.S. Navy Corps of Engineering at the Seebees base in Virginia

Marty worked for Standard Oil and seal distributors in the Detroit Metropolitan area before starting the McMasters Koss partnership.

McMasters Koss Founders
McMasters Koss Family Pictures

A partnership ensued with strong family values throughout the organization. Many members of the families have contributed to the success of the organization and most employees have been with McMasters Koss for an average of 15 years or more

Significant Milestones include purchase of first operational building in 1982 and implementation of QS9000 Quality System in 2000.

Since that time, the McMasters Koss corporate complex encompasses 4 buildings and over 50,000 square feet for inventory, laboratory and inspection facilities.

McMasters Koss History
Company Headquarters

In 2018, McMasters Koss sales surpassed $21MM and current management has invested in infrastructure and staffing to make McMasters Koss foremost in the automotive and truck rubber product and seal industry.

Ed Koss – President and CEO

Michigan State University – Bachelor of Arts in Business Administration
Mercer University – Master of Business Administration

30 Years of Operational and Corporate Management experience including Manufacturer Quality Systems and Finance. Working with industry and corporate organizations to align best practices within McMasters Koss to strengthen customer relationships and deliver more value to customers and partners.

Company Management
General Manager

Paul Pirtle – Vice President and Partner

University of Michigan – Bachelor of Arts in Business

25 years experience in gasket and seal manufacturing and supply chain management. APQP trained to ensuring compliance of supply chain partners and the McMasters Koss organization as a whole. Ensuring resources are available to meet Customer needs with best practice technologies and staffing.

Peter Gibbs – Chief Engineer and Partner

University of Michigan – Bachelor of Science in Mechanical Engineering

15 Years experience in materials testing, seal design and material selection in the automotive, power and electronics industries. Leading the establishment and staffing of the McMasters Koss Engineering facility which began operations in January 2024. Implementing the McMasters Koss ISO/IEC 17025 Testing and Calibration System and scheduling for registration by 2025.

Peter Gibbs Work Station
President and CEO

Gary Gibbs – Former President and CEO

University of Michigan – Bachelor of Science in Mechanical Engineering

Experience in engineering at United Technologies and General Motors.

Joined McMasters Koss in 1994 and became President and CEO in 2000.

Over 40 Years experience in engineering, computer science and corporate management within automotive manufacturers worldwide.

McMasters Koss Headquarters Complex

An dedicated engineering team and facilities have also been incorporated into the organization with state of the art oil seal test equipment, a tooling center and automated inspection machines for superior OEM support of zero defect APQP O-Rings and seals.

  • McMasters Koss Bulk Parts Shipment
  • McMasters Koss Commercial O-Ring Inventory Hallway
  • Customer Specific O-Ring Inventory
  • McMasters Koss Bulk Inventory Area
  • Shipping Department
  • Pallet ready to ship
  • Durometer Tester
  • O-Ring Micro Vu Measurement
  • ASTM Specifications for O-Rings and Rubber Seals
  • McMasters Koss Global Shipping
  • McMasters Koss Headquarters Complex
  • Oil Seal Environmental Test Machine
  • Quad Rings
  • Fluorocarbon O-Rings and Seals
  • Extruded Rubber Gasket
  • Custom Molded Rubber Seals
  • O-Rings
  • McMasters Koss PPAP with APQP Manuals
  • White Rubber Balls
  • Molded Rubber Seals
  • Oil Seals
  • Custom Molded Seals
  • Extruded Rubber O-Rings