Stevens is an enlisted engineer on the USS Defiant who works under Worf's command in the engine room while the ship lies crippled in a gas giant's atmosphere.
Stevens appears in the fourth-season episode Starship Down, played by Jay Baker. He is one of the enlisted engineers aboard the Defiant when two Jem'Hadar ships attack during a trade meeting with the Karemma and the damaged ship sinks into the atmosphere of a gas giant.
Cut off from the bridge, Worf takes charge of the engine room with Miles O'Brien, Stevens, Muniz and a few others. Worf drives the men as he would officers on a Klingon ship, and Stevens and his colleagues grow resentful under the stream of curt orders.
O'Brien quietly advises Worf that enlisted men work best when given a problem and left to solve it. Worf tries it, and Stevens and the team improvise the modifications that let the Defiant fight back.