• Allergan (Irvine, California) named F. Michael Ball president and Raymond Diradoorian executive vice president, global technical operations. David Pyott will maintain his position as Allergan's CEO and chairman of the board. Ball, who joined Allergan in 1995, has served as executive vice president and president, pharmaceuticals since 2003. Diradoorian joined Allergan in 1981, most recently serving as senior vice president, global technical operations. Allergan develops products in the ophthalmology, neurosciences, medical dermatology, medical aesthetics and other specialty markets.

• Peter Fisher has been named vice president of engineering for Omnicell (Mountain View, California), a provider of patient safety solutions. Prior to joining Omnicell, Fisher served as vice president of engineering for the broadcast division of Pinnacle Systems.

• Lisa McDermott has been named CFO and treasurer of Pall (East Hills, New York). She assumes the CFO role from the company's president, Marcus Wilson, who had previously held both positions. McDermott joined Pall in 1999 as controller and chief accountant before being promoted to vice president finance and chief accounting officer. Pall is a leader in the field of filtration, separations and purification, focused on Life Sciences and Industrial markets.

• Robert Friel has been appointed president of PerkinElmer's (Boston) Life & Analytical Sciences unit, which focuses on providing applications-based solutions to customers in the genetic screening, biopharma and analytical sciences markets. Friel will succeed Peter Coggins, who will retire in February but will continue to serve as a senior advisor and consultant through mid-2007. Friel will continue as vice chairman of PerkinElmer, and remains a member of its board of directors. Prior to being appointed vice chairman, Friel served as executive vice president and CFO of the company, which he joined in 1999. PerkinElmer also named Dr. Aaron Geist vice president, business development. Geist joins PerkinElmer from Robert W. Baird, where he served as director and senior research analyst.

• John Hummel has joined Perot Systems (Plano, Texas) as national director of its Clinical Solutions Center. Hummel to provide clinical information system and hospital information technology leadership to further strengthen the company's implementation and transformation delivery capabilities, and ensure that best practices and methodologies are consistently replicated. He joins Perot Systems from Sutter Health, where he served as senior vice president of information services. Perot Systems is a provider of information technology services and business solutions.

• Prototype (Windsor, Connecticut), a laboratory automation provider, named Fran Tuttle president and CEO and as a member of the board of directors. Tuttle has more than 25 years of experience in life sciences leadership, most recently as senior vice president of near-patient testing at Bayer Diagnostics. The company also elected Rolf Classon chairman of the board. Prototype's BioCube System brings advanced industrial automation capabilities into life science and diagnostic laboratories.