Chesapeake Corp., a wood and paper products firm in West Point, Va., has named J. P. Harper, formerly woodlands manager, to vice president. Sharon R. Miller, director of woodlands planning for the past year, has been promoted to woodlands manager, succeeding Harper. Also, Ronald G. Roberts, previously a general manager at Federal Paper Board Co., has been hired as wood products general manager. And, Patrick Kevin Barron, formerly with Procter & Gamble, will become Chesapeake's director of transportation, a new position.

Frank Gary, formerly of Hurco Manufacturing, has been elected president of Deckel Corp. of Columbia, Md. Deckel Corp. is a subsidiary of the West German company Friedrich Deckel A.G., and distributes milling and boring machines.

The board of directors of Martin Marietta Corp. has elected Robert W. Powell Jr., formerly treasurer of the corporation, and Dan A. Peterson, formerly vice president for business development, corporate vice presidents. Powell joined the corporation in 1956 and served as controller and treasurer for aerospace operations. Peterson joined Martin Marietta in 1968 at its Orlando aerospace operation.

Atlantic Research Corp., based in Alexandria, announced the promotion of eight of its top corporate executives who "have demonstrated entrepreneurial drive and outstanding accomplishments." Promoted to senior vice presidents were James R. Sides, formerly vice president and general manager of ARC's Propulsion Division; Christopher W. Robertson, formerly vice president finance and corporate treasurer; and George K. Oss, formerly vice president and general manager of ARC's teleproducts division. Promoted to vice presidents were Lambert C. Murphy, formerly corporate director of administration; Aaron J. Larkins, general manager of the electronics and communications division; Robert S. Hinton, formerly corporate director of human resources; Keith B. Mullin, general manager of the corporation's Camden Plan in Arkansas; and Paul F. Lumbye, assistant general manager and director of Virginia operations for ARC's propulsions division.