The post created for Worf on Deep Space 9 in 2372, giving him responsibility for co-ordinating all Starfleet activity in the Bajoran sector.
Strategic operations officer is the position Worf takes up when he joins the crew of Deep Space 9. The officer directs Starfleet movements throughout the Bajoran sector, advises the station commander on the military situation, and wears command red, not the gold of security.
The post is created in the Deep Space Nine episode The Way of the Warrior. Sisko asks for Worf to help him understand why a Klingon fleet has gathered at the station. After the Klingons attack, Worf, who had been thinking of resigning, accepts Sisko's offer to stay.
In practice the role makes Worf the station's expert on the Klingons and, later, a regular commander of the USS Defiant. Because Odo remains chief of security, the two clash over jurisdiction in episodes such as Hippocratic Oath.