(covers information from several alternate timelines)
Sergeant B. Moreno was one of the MACOs assigned to Enterprise NX-01 for its Delphic Expanse mission in 2153.
In September of 2153, Moreno participated in the mission to rescue Captain Archer, Commander Tucker, and Kessick from the trellium mining planet. ("The Xindi")
He was part of Lieutenant Malcolm Reed's security detail to defend Enterprise from the invading Xindi-Reptilian boarding party. Together with Reed and G. Austin, Moreno engaged a Xindi-Insectoid soldier in one of the corridors. Austin was hit by a blast from the Xindi-Insectoid rifle but Moreno and Reed routed the Xindi. (ENT: "Rajiin")
In an alternate timeline, Moreno, along with W. Woods and R. Ryan, fended off a Xindi-Reptilian boarding party. (ENT: "Twilight")
Moreno joined the crew and the Triannons aboard Shuttlepod 1 during their visit to the Triannon homeworld. (ENT: "Chosen Realm")
He was also one of the MACOs who tried to stop the Sphere-Builder test subject during his walk through Enterprise. The MACO group was not successful. (ENT: "Harbinger")
In 2154, Sergeant Moreno was one of the MACOs who tried to stop the Andorians who escaped from their arrest and tried to reach the Tellarite ambassadors. (ENT: "Babel One")