Polycom (News - Alert) appointed D. Scott Mercer to its board of directors, according to release today from the company. A recognized leader in the technology industry, Mercer has enjoyed a career that covers three decades and a variety of executive functions. These functions range from operations and strategic planning to finance, within both the storage and computer industry segments.   "We are very pleased to welcome Scott to the Polycom board of directors where his proven business development and long term strategic planning, as well as strong financial expertise, will prove invaluable for us as voice and video collaboration become core, mainstreamed applications across devices over IP networks," said Polycom chairman and CEO Bob Hagerty.   Currently, Mercer is the chairman of the board at Adaptec (News - Alert), and two years ago served as its interim CEO. He was chief financial and chief administrative officer at Western Digital Corporation in the early 1990s, and returned in 2001 as CFO, a position he held for three years. In the late 1990s, he served as VP of finance and VP of product development at Dell (News - Alert). Mercer's other previous positions include CFO at TeraLogic, and CFO and controller at LSI Logic.   Mercer is on the boards of Conexant Systems, Palm, Inc. (News - Alert) and SMART Modular Technologies, Inc. He received a BS in Accounting from California Polytechnic University.