BRISBANE, Australia & EMERYVILLE, Calif.--(BUSINESS WIRE)--Peplin Limited (ASX:PEP) today announced the appointment of George W. Mahaffey as Chief Commercial Officer and Vice President, Sales and Marketing. Mr Mahaffey was previously Senior Vice President, Sales and Marketing at CoTherix, Inc, which was acquired by Actelion Pharmaceuticals (SWX:ATLN) last year.