Open/Close Menu Cassidy Law PLLC is a D.C. professional limited liability company with an office in DC. MM Cassidy Law is an Ohio limited liability company with an office in the Cleveland, Ohio area. Each entity is constituted under the laws and regulations of the jurisdiction where the offices are located and is owned by the same principal. Both entities are law firms constituted to provide legal services to clients as defined in the terms of engagement between the Cassidy Law and the client.