James R. Wittmeyer has been appointed vice president-operations at Pennsylvania Shipbuilding, Chester, Pa. He succeeds John A. Serrie, who has retired after more than 40 years in the shipbuilding industry. Mr. Wittmeyer has 30 years of experience in shipbuilding.
Kenneth Wood has been appointed president and chief executive officer of Halifax Industries Limited of Nova Scotia. He succeeds William J. Riley, who is leaving Halifax to become "more involved in offshore and other developmental activities." Mr.