EXECS ON THE MOVE: Lunch meats processor Land O'Frost, Lansing, Ill., said it promoted David Van Eekeren to president. The company also promoted Chuck Niementowski to chief operating officer . . . Paperboard packaging suppler Rock-Tenn, Norcross, Ga., said 34-year veteran David Dreibelbis, executive vice president and general manager for the company paperboard division, has retired due to health reasons. In conjunction, Rock-Tenn announced the following appointments: Mike Kiepura was named executive vice president, responsible for consumer packaging folding cartons; Dick Steed was named executive vice president, responsible for a joint venture with Sonoco Products and other areas; Jim Porter was named executive vice president, responsible for containerboard and corrugated packaging; and Steve Voorhees, executive vice president and chief financial officer, also was named chief administrative officer.