Alex Smutko was a Starfleet officer in the 24th century.
In 2371, he was a crewmember aboard the USS Voyager. He was among the crew stranded in the Delta Quadrant, when Voyager was forcefully brought there by the Caretaker.
In 2374, as an lieutenant, he was listed on a crew manifest. (VOY: "The Killing Game")
This character was only mentioned in writing.
Alex Smutko was named for construction coordinator Al Smutko