Harris Waste Management Group Inc., Peachtree City, Ga., has hired Randy Gibson as technical sales assistant for Harris/Selco Products; Joyle Rhodes as electrical engineer; Helmut Koehler as lead engineer for Harris Shredders Division; and Stephen Wright and Hank Swats as engineers for Harris' Baxley, Ga., site.

GreenMan Technologies, Lynnfield, Mass., has hired Gary Bryant as director of marketing for the Southeast region.

Robert Doletzky has been named vice president of international sales and marketing at Sweepster Inc., Dexter, Mich.

Western U.S. Sales Manager Mark Smiler, Eastern U.S. Sales Manager Steve Brisco, Production Manager Brad Tiedemann and Chief Engineer Billy Daniels, former employees of The Toro Co., Minneapolis, have followed the Progrind Recycling Division to Leeds, Ala., corporate headquarters for Precision Husky Corp. Precision purchased the Recycling Division from Toro in 1998.

Michael Slack has been named product development manager for Grindmaster, Jamestown, N.D.

The Environmental Products and Technologies Corp., Westlake Village, Calif., has hired Robert Stewart as director of government relations and municipal waste systems sales.

National Seal Co., Aurora, Ill., has appointed D. Kevin Blair as chief operating officer. Joel Fruendt has been appointed vice president of sales and marketing, and Linda Englander has been appointed marketing manager.

David Schellberg has been promoted to assistant sales manager of McLanahan Corp., Hollidaysburg, Pa.

Bridgestone/Firestone Off Road Tire Co., Nashville, Tenn., has promoted John Cotham to director of corporate accounts. Jim Bee, Dave Neumann and Danny Pierce have been promoted to regional general managers, and Patricio Vega has been promoted to director of export sales.

Steven B. Blake, chairman and CEO of the environmental and engineering services consulting firm ARCADIS Geraghty and Miller, Denver, has been named a member of the executive board of ARCADIS NV, Arnhem, The Netherlands. The board oversees the strategic direction of the ARCADIS family of companies.

James Lewis has joined the Stone Bluff, Okla.-based Greenway Environmental Inc.'s and its parent company, Chicago-based The Alta Group Ltd.'s board of directors.

Robert T. Meyer has been promoted to construction group manager of Blazosky Associates Inc., State College, Pa.

Ellen Bogardus has rejoined HDR Engineering Inc., Alexandria, Va., and its Municipal Advocacy and Economics Program as a practice leader and vice president.