Attorney Sweeney graduated from the University of Massachusetts with a BA in economics in 1992. He later graduated near the top of his class from the Massachusetts School of Law in 1996. He then began his legal career working as an associate attorney for well known Boston trial attorney, Frank Corso, where he concentrated in civil litigation and real estate. Attorney Sweeney became a partner with Attorney Corso before opening his own firm in 2004. Since 2004, Attorney Sweeney has concentrated his practice in the areas of personal injury and real estate, representing developers, lenders and individual home buyers and sellers.