Waste Management Inc. has relocated the headquarters of its Sustainability Services Group to Windsor, Conn.

Houston-based Waste Management said in a news release that more than 500 sustainability services employees will work at the Windsor site, the former headquarters of Oakleaf Waste Management LLC, which Waste Management purchased in July 2011.

The positions came from multiple Waste Management locations nationwide, as well as some new hires, said Wes Muir, director of corporate communications for the company, in an e-mail.

Since Waste Management acquired Oakleaf it has developed or transferred 113 positions to the Windsor offices and expects to add 67 more jobs in 2012...