Mayville Engineering Co., 715 South St., promoted Thomas J. Verbos to vice president and general manager of the contract and prototype divisions. He joined the company in 1998 as a sales account manager and most recently served as vice president of sales for contract and prototype divisions. MEC also promoted Timothy J. Birkholz to plant manager for contract and prototype operations. He was hired in 2004 as materials manager. Ryan F. Raber, the contract division's sales director, will assume sales responsibilities for prototypes.

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