Precision Optics Corp. Inc. of Gardner, Mass., a manufacturer of advanced optical instruments, announced the appointment of Michael T. Pieniazek as vice president and CFO and Brian Spies as director of marketing. Pieniazek brings over 25 years of broad international financial, operational and administrative management experience having served in various senior executive positions including president, executive vice president and CFO at several publicly-traded medical device and biotechnology companies. He began his career as an auditor with PriceWaterhouseCoopers LLP and has extensive experience in acquisitions, managing corporate structure in growing organizations, and evaluation and execution of debt and equity financing transactions. Spies has more than 25 years of medical device experience, and previously worked as vice president of marketing for Astra Tech (the dental implant division of AstraZeneca), as global team leader of digital OR and visualization for Smith & Nephew Endoscopy, and director of Geographic Expansion and Business Development for Becton Dickinson Surgical Systems.