David Palmer has been appointed president and CEO of ClearCount Medical Solutions (Pittsburgh). Palmer most recently served as COO at the Pittsburgh Life Sciences Greenhouse, and before that was CEO of Confirmant, a joint venture between Marconi and Oxford Glycosciences. ClearCount is focused on developing systems that improve patient safety inside the operating room.

Dr. Joseph Chimera will be joining Commonwealth Biotechnologies (Richmond, Virginia) as senior vice president, sales, marketing, and business development. Chimera brings more than 20 years experience in the life sciences services area, with an extensive background in genomics, clinical testing and informatics. Commonwealth Biotechnologies provides a complete array of the most current analytical and synthetic chemistries and biophysical analysis technologies to the global biotechnology industry, academic institutions, government agencies and pharmaceutical companies.

Nick Terrett, PhD, will join Ensemble Discovery (Cambridge, Massachusetts) in the newly created role of chief scientific officer. Terrett comes to Ensemble from Pfizer where he has spent more than 20 years in various research capacities, most recently as the head of the Chemical Sciences Department in the Pfizer Research Technology Center. Ensemble Discovery is developing a new approach to chemical discovery based on a highly integrated set of processes that combine chemistry, biology and nanotechnology.

Christopher Click has been named vice president of marketing for InnerWireless (Richardson, Texas). Before joining InnerWireless, Click was the director of the Radiology IT Marketing Group for Philips Medical Systems. InnerWireless provides wireless coverage inside hospitals and healthcare-related facilities with its medical-grade Wireless Utility, a unified, broadband wireless distribution platform.

Linda McKibben, MD, has joined healthcare and human services consulting firmThe Lewin Group (Falls Church, Virginia) as a vice president. McKibben, who is board certified as a preventive medicine specialist, most recently served as senior advisor on health services research in the Office of the Director of the Division of Health Quality Promotion at the Centers for Disease Control and Prevention's National Center for Infectious Diseases.

Barry Stewart has been appointed senior vice president and CFO of LHC Group (Lafayette, Louisiana), replacing Barr Brown, effective June 1. Stewart was most recently CFO of Rotech Healthcare. Brown has agreed to remain with LHC Group as a part-time consultant. LHC Group provides home-based services through its home nursing agencies and hospices and facility-based services through its long-term acute care hospitals and rehabilitation facilities.

Securities and Exchange Commissioner Cynthia Glassman, PhD, announced that she intends to leave the SEC (Washington) after the completion of her current term. Since joining the SEC in January 2002, Glassman has championed investor education, enhanced disclosure and increased use of economic analysis in SEC rulemaking. She served as acting chairman of the commission during the summer of 2005. In addition, Associate Director of Enforcement Paul Berger will leave the commission to become a partner in the law firm Debevoise & Plimpton. During his 14-year tenure, Berger supervised and conducted investigations and enforcement activities that spanned a wide array of matters.

• Spire (Bedford, Massachusetts) has appointed Dr. Christian Dufresne to the position of CFO, replacing James Parslow. Dufresne has been with Spire for six years, most recently serving as vice president - corporate planning. Spire is a diversified technology company providing biomedical devices, solar energy manufacturing equipment, and optoelectronic components.

Biggs Porter has been appointed CFO of Tenet Healthcare (Dallas), effective June 5. Porter will join Tenet from Raytheon, where he serves as vice president and corporate controller. He also serves as Raytheon's principal accounting officer. Porter succeeds Robert Shapard, who resigned as Tenet's CFO last November. Tenet Healthcare, through its subsidiaries, owns and operates acute care hospitals and related healthcare services.