The Law Office of Matthew Callis aims to assist clients in understanding and navigating the legal system. A lawyer who can work with you is essential if you want to secure your estate, trust, will, or testament. A negotiation is a valuable tool that allows our clients to control the outcome of their cases. While we will help you negotiate settlements whenever possible, our team will also prepare for your defense in the event of a trial. Boston. Matthew began his legal career in the public sector, working at the Department of Environmental Protection as well as the Volunteer Income Tax Project. Callis was previously employed by the Sunday Law Firm, Nanjing China, before opening his own law practice. Callis currently focuses on wills, estates, trusts, matrimonial/family law, and child and divorcing law.