Google ATC Corp Boston

http://www.americantower.com/corporateus/global-country-selector/index.htm

"American Tower Corporation is a real estate investment trust. It invests in the real estate markets across the globe. The firm through its subsidiaries owns, operates and develops wireless and broadcast communications real estate. Through its subsidiaries it leases antenna space on multi-tenant communications sites to wireless service providers, radio and television broadcast companies, wireless data providers, government agencies and municipalities and tenants in a number of other industries. American Tower Corporation was founded in 1995 and is headquartered in Boston, Massachusetts."

Put 2 + 2 together with Dan Metcalf having a history of working in the telecommunications industry and the fact his Linkedin says he works at ATC Corp, it's not that hard to figure out that is where he works.