John J. McMullen Associates, Incorporated (JJMA) was a naval architecture firm in the United States, specializing in ship design and marine-related technical consulting between 1957 and 2005.
Success in naval programs support led to them as l further expansion with JJMA operations supporting NAVSEA in Pascagoula, Mississippi, Bath, Maine, Port Hueneme, California, Newport News, Virginia and several other U.S. shipbuilding centers.
By the mid-1980s, JJMA was active in naval combat systems installation integration and was a key member of the NAVSEA Iowa-class Battleship Modernization Program.
JJMA was one of the original tenants of the World Trade Center towers, and maintained offices in the WTC until the infamous 9/11 terrorist attack in 2001.
In 2019, the Naval Systems Business Unit was sold to Serco,[3] a British provider of public service.