John D. Groendyke was elected chairman of the National Tank Truck Carriers.

Groendyke is chairman of the board and CEO of Groendyke Transport, Enid, Okla., one of the largest carriers of bulk commodities in North America. He holds a law degree from the University of Oklahoma and is a veteran of the U.S. Army. He currently serves as a commissioner of the Oklahoma Department of Wildlife Conservation.
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