Expert Server Group, a leading supplier of virtualization offerings for the enterprise market, today announced the appointment of Patrick L. Clark as Chief Operating Officer. As COO, Clark will be responsible for developing and overseeing Expert Server Group’s growing sales force and customer relations programs.

“Pat’s expertise in building and managing national and worldwide sales operations will be particularly valuable to Expert Server Group as we continue to grow our business around our virtualization offerings,” said Doug Weisberg President and CEO, Expert Server Group. “Pat is already making a big impact as we bring specific virtualization offerings to the enterprise marketplace.”

Clark’s extensive background spans the history of Internet and networking technology, starting early on as a co-founder and VP of Sales and Marketing at Interlan, one of the first local area network product companies, and continuing through his most recent role as head of Worldwide Sales for Converged Access, a leader in VoIP Application Performance Management.

Clark also brings the experience of building worldwide sales organizations. Prior to Converged Access, he was head of North American sales and service at Phone.com, a leading provider of wireless Internet infrastructure software to global telecommunications companies. Before that, he was the vice president of worldwide sales with Paragon Software, a leading provider of data and content synchronization software for the major wireless handset vendors and global telecommunications companies that was acquired by Phone.com in early 2000. Prior to Paragon Software, Clark was vice president of worldwide sales at Software.com, a leading provider of Internet/Intranet infrastructure software to global Telcos and Internet Service Providers (ISP's). Previous to Software.com, Clark was EVP worldwide sales and field marketing for Computervision, a leading provider of CAD/CAM software and services where he was part of the successful turnaround of this $800 million software company.

Clark held significant roles in startup and high growth companies throughout his career. First, as the co-founder of Interlan, an early pioneer in the local area networking product space, and then serving as EVP and general manager with Microcom, a leading manufacturer of protocol modem, internetworking bridges/routers and communications software.

Clark also was a general partner of Windspeed Ventures, a seed round and early stage investment group in software and communications infrastructure companies. Clark sat on the advisory board for privately held companies Bitfone, Esmertec and Vividon.