About Senn. Senn is an industry leading real estate advisory and investment firm operating in most of coastal New England and beyond. Headquartered along Boston's historic Waterfront, our work has reached to Washington DC, New York, Rhode Island, and New Hampshire and our team has grown to more than 150 professionals. We're in the business of relationships, and that has been the key to our growth. Since our founding in 2009, Senn has been committ...