The appointment comes as environmental concern tops the media agenda in the wake of this week's high-profile Stern report.
Bite will show how Polycom's latest UltimateHD high-definition video-conferencing system can cut a company's carbon output by reducing staff travel.
The system is targeted at big business and the public sector, and Polycom claims it can be as effective as face-to-face meetings.
Polycom also wants to get its systems into classrooms and hospitals.
‘In the past, video-conferencing has been slightly jumpy, putting companies off using it as a reliable form of communication,' said Bite associate director Nick Rappolt, who leads the account.
He said: ‘This system has HD pictures and CD-quality voice. We are looking to promote it by showing the reduction in environmental impact that enterprise customers can achieve by saving on flights and nationwide meetings.' Rappolt reports to Polycom EMEA marketing director Tony Heyworth.
Bite won the UK, Nordics and Benelux account after a four-way pitch.