Dennis Serpone, President
New England Restaurant Brokers
"The Sigma Agency is second to none. A reputation for excellence and outstanding achievements in
security and investigative areas. Sigma offered a unique portfolio of solutions to safeguard my company."
Neal R. Rossi
District Manager - New England
Government & Public Affairs
United Parcel Service - UPS
"The level of professionalism that the Sigma Agency provides is unmatched by any other private
investigative and security consulting firms. The Sigma team is comprised of some of Massachusetts finest investigative experts"