Dr. Vegapunk plays a pivotal role in the SSG and the Marines as the leader of their scientific research and development team, known as the 'Science Unit'. He is responsible for most of the special technology found in the hands of the Marines, including the innovative use of Seastone lining. Vegapunk's genius has led to him being in charge of several advanced Marine and government facilities, such as Punk Hazard and Egghead. His bodyguard, Sentomaru, acts as the captain of the Science Unit.