Cyvex Nutrition, Irvine, CA, has tapped Vinh Do as technical services manager. He will oversee and further enhance Cyvex’s A-rated GMP quality assurance procedures, including purity and analytical testing on the company’s range of products derived from fruits, vegetables, botanicals and marine oils. Mr. Do previously spent five years at Rich Products Corp./Jon Donaire Desserts, where he advanced to become quality assurance team leader.