The operations division, also referred to as engineering division, was the corps of officersand crewmen within Starfleet who specialized in services and military functions on starbases, aboard starships, and at Starfleet Command. Members of the operations division may have specialized in a ship or base service, administration, or military operations, or served as staff officers. Operations officers included engineers, security and tactical, and some service specializations such as communications. Operations division personnel also filled administrative posts as yeomen, personnel officers, and portmasters. By the 24th century, this division had new postings established on ships, such as operations officers (or chief of operations).
Officers who belonged to the operations division sometimes wore the division color of another department than that which they specialized in. For example, if an operations officer were to become a department head, he or she might have worn the colors of the command division, or an officer with dual specialties in sciences and operations might have worn the sciences colors.