John Mulcahy, left, has just been appointed senior vice president of communications, public affairs and stewardship for Georgia-Pacific. David Brabham, right, will fill Mulcahy's previous role of vice president of stewardship. Georgia-Pacific announced leadership changes today. John Mulcahy, former vice presdient of stewardship, is now the senior vice president of communications, public affairs and stewardship. Mulcahy's appointment comes in the wake of the retirement of Shei