Mitsui Machinery Distribution, Bridgeport, N.J., has promoted Ron Johnson to president and CEO. Johnson previously was vice president of marketing for the material-handling division and replaces Steve Duce, who will retire after 23 years with Mitsui.

David Williams, vice president of Gradall Co., New Philadelphia, Ohio, has been elected chairman of the Construction Industry Manufacturers Association, Milwaukee.

Alan Oswald was appointed sales training coordinator for Snorkel, St. Joseph, Mo.

Ingersoll-Rand, Woodcliff Lakes, N.J., has named Larry Silber as vice president of U.S. and Canadian sales for its construction and mining division.

Edward Samera has been appointed vice president of quality and product support in North America for Terex Lifting, Conway, S.C. Robert Halls will assume Samera's previous position as vice president and general manager for Terex Aerials, Milwaukee. Linda Pruin, director of North American sales for Terex Cranes, Waverly, Iowa, will add the same responsibility for Terex Aerials products.

Bob Costello has been named a district manager for Stone Construction Equipment, Honeoye, N.Y., covering Oklahoma, New Mexico, Colorado, Wyoming, Utah and parts of Texas.

Orix Credit Alliance, Secaucus, N.J., appointed Sandy Kallick as chief operating officer.

Wap Cleaning Systems, Charlotte, N.C., has hired Ken Rothmel as vice president of marketing and sales, Martin Sijmons as head of customer service and chief technical manager, and Patrick Lowder as inside sales and customer service supervisor.