Casual clothing and sports apparel designer and produce Quiksilver Inc has appointed Greg Ziegler to the position of chief operating officer and promoted several other key employees. The California-based firm said Ziegler was given the title to match duties he was already carrying out and also said it has split financial responsibilities with Bill Bussiere being named CFO of Quiksilver USA to allow CFO Steven Brink to concentrate on acquisitions and global operations.