Avistar Communications Corp. announced the resignation of its CEO, Simon Moss, and has appointed Bob Kirk as the company’s new CEO.

“I was brought in to turn the firm around and we have been successful in achieving that goal. I am incredibly proud of what we have achieved – addressing difficult corporate challenges in the most difficult of economic circumstances – and incredibly proud of the team, the technology and the company we have built,” said Moss. “But I am a turnaround specialist, and with Avistar progressing well and after approaching the company, we agreed to build a transition plan and put new leadership in place. I want to thank the team and board, many of whom I consider friends, for such incredible hard work that enabled us to be successful and build a strong foundation for the future.”

Moss’s successor, Kirk, has 30 years of experience in management, marketing, sales, business development and most importantly, growing companies. He most recently served as the CEO of ChoicePay prior to its sale to Tier Technologies.