(written from a Production point of view)
Gregory Wagrowski (known earlier in his career as Grzegorz Wagrowski) is an actor who played Vulcan Captain Solok in the Star Trek: Deep Space Nine episode "Take Me Out to the Holosuite" and Ceris in the Star Trek: Enterprise third season episode "Chosen Realm" in 2003. His costume from "Chosen Realm" without the vest was later sold off on the It's A Wrap! sale and auction on eBay and was previously worn by Alexander Slanger in the second season episode "The Breach".  
Wagrowski guest starred with William Shatner and James Darren in the T.J. Hooker episode "The Obsession". Primarily a stage actor and director, Wagrowski co-starred with Robert Beltran in "Stars in the Morning Sky" at the Los Angeles Theatre Center and with Andreas Katsulas in "Zastrozzi" at the Public Theater.