CON-WAY EASTERN EXPRESS (Rutherford, N.J.) - Dennis G. Glavan was appointed to the new position of pricing manager. He will be responsible for computing tariff formulas for shippers.

Mr. Glavan was transportation manager with Beckton, Dickinson & Co. in Franklin, N.J, a medical products supplier. CEX, a subsidiary of Consolidated

Freightways Inc., is predominantly a less-than-truckload carrier with 32 terminals.FRUEHAUF CORP. (Detroit) - Robert G. Siefert was named chief operating officer. He replaces Robert D. Roland, Fruehauf's chairman, who will retire as chief operating officer on May 5.

Mr. Siefert remains president and chief executive officer of Kelsey-Hayes Corp., Fruehauf's automotive parts subsidiary.

John E. Utley was appointed president and chief operating officer of Kelsey-Hayes. He was president of the unit's automotive group.