(written from a Production point of view)
Derek Bulger is an actor who played an Osaarian marauder in the Star Trek: Enterprise episode "Anomaly". He received no on-screen 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 where his name was misspelled as Derek Bulgar. 
Bulger played Pedro in the 1999 short film Thicker Than Thieves and was alongside Kim Koscki involved in the production of the independent film Dementia: An Experiment in Terror (2004).