Thomas S. Duerr, to president and CEO-was vice president and general manager for an undisclosed distribution company.
DUNLOP TIRE CORP.-James H. Gray, to senior vice president of manufacturing and engineering-was vice president and plant manager.
Jason P. McDonald, to high performance specialist, responsible for conducting training sessions and ride-and-drive events-recently graduated from StephenF. Austin State University in Texas.
GENERAL TIRE-Thomas G. Salpietra, to director, export and international sales for General's passenger/light truck division-was director, dealer sales, Continental brand.
INTERNATIONAL MARKETING INC.-Robert P. Chambers, to vice president of equipment engineering and quality control, also responsible for implementing an upgraded customer service program-was a senior project manager for Federal Express Corp.
NOKIA TIRES (CANADA) LTD.-Kevin Brown, to forestry specialist-was product manager, agricultural and forestry tires, with Bridgestone/Firestone Canada Inc.
OLIVER RUBBER CO.-Ron Kessler, to director of manufacturing-was plant manager of Oliver's Oakland, Calif., plant.
David Seward, to district manager in Kentucky and Tennessee-held various positions with several large tire operations in Louisville, Ky.
Mack Thurmond, to vice presi-dent, finance-was controller in the company's Goldsboro division.
POLYMER ENTERPRISES INC.- Donald D. Mateer, to chairman of the board of the company, parent of Specialty Tires of America Inc.-remains president and CEO.
RELIABLE TIRE CO.-Joe Thomas, to chief operating officer of Reliable, parent of Spartan/Madison Tire Division-remains president of Spartan/Madison.
ULTIMA RUBBER PRODUCTS-Les Mugford, to manager, technical services and equipment for this unit of Robbins Inc., responsible for equipment support, sales and service-was a regional account manager for Teknor Apex Co.