Lieutenant Michael Sloan was a Starfleet officer who served during the early 25th century. In 2401, Sloan served on the USS Titan-A's beta shift. (PIC: "The Next Generation")
This character was only mentioned in writing. They were listed on an illegible duty roster in "The Next Generation" which was later shared by Bill Krause on Twitter. [1]
Michael Sloan was a member of the costume department on Star Trek: Picard and the namesake of this character.