• Lifestream Technologies (Post Falls, Idaho) has appointed Ed Siemens chairman, and Matt Colbert president and CFO, replacing Christopher Maus, who will remain as a director with the company, as well as a consultant to facilitate financing and strategic business development. Lifestream is a developer of consumer cholesterol monitors and professional screening instruments.

• Todd Andrews has been named CFO of MQ Associates (MedQuest; Alpharetta, Georgia). Andrews has assisted MedQuest with strategic and development initiatives since February 2006. He previously served as CFO of SavaSeniorCare. MQ Associates is a holding company and has no material assets or operations other than its ownership of 100% of the outstanding capital stock of MedQuest, an operator of independent, fixed-site, outpatient diagnostic imaging centers in the U.S.

• Michael Austin has been named vice president sales and marketing of Paradigm Medical Industries (Salt Lake City). Since 2000, Austin served as sales-purchasing manager for X-Mission. Paradigm Medical Industries manufactures diagnostic equipment and consumable products for the medical industry.

• Jeff Hastings has joined Patient Care Technology Systems (PCTS; Mission Viejo, California) as vice president of technology. Hastings joins PCTS from TeleHealth Services where he led the design, development and commercialization of two integrated point-of-care solutions. PCTS, a subsidiary of Consulier Engineering, is a provider of patient safety solutions in the high-acuity segments of healthcare.

• Carl Turza has been named chief information officer for Sigma-Aldrich (St. Louis), effective May 1. Turza brings more than two decades of senior IT management experience to Sigma- Aldrich. Sigma-Aldrich's biochemical and organic chemical products and kits are used in scientific and genomic research, biotechnology, pharmaceutical development, the diagnosis of disease and as key components in pharmaceutical and other high technology manufacturing.