(written from a Production point of view)
Wayne Grace is an actor who guest starred in Star Trek: The Next Generation, Star Trek: Deep Space Nine and Star Trek: Enterprise. His costume from the episode "Wrongs Darker Than Death or Night" was sold off on the It's A Wrap! sale and auction on eBay. 
His motion picture credits include Dances With Wolves, Volcano, Mulholland Drive (with fellow DS9 guest stars Blake Lindsley and Michael John Anderson), and The Work and the Glory. In 1995 he appeared in an episode of The X Files again alongside Anderson, and Vincent Schiavelli.
He has also lent his voice to several computer games, including Star Trek: Klingon Academy.