(written from a Production point of view)
Carlo Antonazzo is an actor who appeared as a Starfleet officer in an episode of Star Trek: Voyager. He received no credit for his appearance and was identified by the name tag of his costume which was sold off on the It's A Wrap! sale and auction on eBay.  Antonazzo also appeared in an episode of Star Trek: Enterprise. His costume, a sleeveless green/ orange robe, was also sold off on IAW and was previously worn by background actor James Flannigan. 
Antonazzo played the featured part of a security adviser in Steven Soderbergh's comedy crime sequel Ocean's Twelve in 2004 which also featured Star Trek performer Scott L. Schwartz. In addition he portrayed a Swiss guard in a 2006 episode of the daily soap Passions.