Northrop Grumman Corporation has appointed three vice presidents to key positions in its newly formed Shipbuilding sector, effective immediately. John J. Mazach has been appointed sector vice president of business development, Eric Womble has been named sector vice president of advanced capabilities group, and Daniel L. Arczynski will serve as sector vice president of strategic planning and development. Northrop Grumman Shipbuilding, a newly-formed sector of Northrop Grumman Corporation, is made up of the former Northrop Grumman Ship Systems and shipbuilding entities. Mazach leads all Shipbuilding marketing, customer and government relations initiatives.