Michael Arbon has been named CFO ofPrecision Optics(Gardner, Massachusetts). The company said that Arbon “brings nearly 20 years experience as lead financial executive or chief operating officer for technology-based development and manufacturing companies. Arbon succeeds Jack Dreimiller who will continue in a consulting capacity to the company over the next 14 months. Precision Optics is an optical design and development company.

Daniel Waldmann has been named vice president, government relations, for Tenet Healthcare (Dallas), with responsibility for directing Tenet’s government relations activities at the local, state and federal levels and will have offices at Tenet headquarters in Dallas and in Washington. Previously, Waldmann served as director, federal affairs and reimbursement, for Johnson & Johnson. From 2000 to 2003, he was executive director of the Medical Technology Leadership Forum. Tenet owns and operates acute-care hospitals and related healthcare services.

John Chapman, PhD, has been named executive director of scientific affairs at Thermogensis (Rancho Cordova, California). Most recently, he held the position of senior vice president of research and development at V.I. Technologies. Thermogenesis develops technologies enabling the development of cell therapeutics.

Nathan Bailey has resigned as vice president and controller of United Medicorp (Pampa/Garland, Texas) to pursue other business opportunities. Bailey joined the company in August 2000 as corporate controller and was promoted to vice president and controller in March 2002. United Medicorp provides extended business office, claims coding and medical record storage services to healthcare providers.

Joaquin Wolff has been named vice president, global marketing and sales for VisionCare Ophthalmic Technologies (Saratoga, California). Wolff joins VisionCare from VISX, where he was vice president of global marketing from 1999 to June 2005. VisionCare Ophthalmic makes prosthetic devices for the treatment of macular degeneration and other vision disorders.

Richard Juelis has been named vice president, finance and CFO of WorldHeart (Oakland, California). Over the past 15 years, he has served as CFO at Xoma, Vivus and, most recently, at Cellegy Pharmaceutical. WorldHeart makes the Novacor left ventricular assist system, a pulsatile heart pump.