An aerospace giant and a small business both have won multimillion-dollar defense contracts in Central Florida. Northrop Grumman’s Military Aircraft Systems division in Melbourne won a $16.2 million modification to an existing Naval Air Systems contract, according to the U.S. Department of Defense. About 75% of the work will be performed in Melbourne. The contract calls for the installation of informational and radio systems for the E-2D Advanced Hawkeye aircraft. The work will be done on behalf of the government of Japan and is expected to be completed in December 2021. Falls Church, Virginia-based Northrop Grumman Corp. (NYSE: NOC) employs more than 3,000 workers in Melbourne, with 380 open jobs at the facility. Those jobs include openings for engineers and software analysts. Meanwhile, Winter Park-based ZelTech Training Solutions LLC — a related entity of Hampton, Virginia-based ZelTech Technologies LLC — won a $10 million contract to provide the U.S. Army with three pyrotechnic cartridge launchers, along with a variety of training equipment and support.