About Us For over 20 years, the Law Office of Rosario Mario F. Rizzo has provided comprehensive legal services to businesses in the greater Boston area. Our comprehensive business law and litigation practice, based in Concord, protects businesses in all aspects of their operations. From formation through contracts, transactions, lawsuits, employment and shareholder matters, we have the experience you can rely on. From his service in the JAG, attorney Mario F. Rizzo has conducted dozens of trials and brings unique insights to government contracts, particularly the government procurement process. Take advantage of our legal strategy today and schedule a consultation with us. Call 978-371-2500.