He is perhaps best known for his role as Ethan Rayne in the television series Buffy the Vampire Slayer (in which he appeared with his fellow Voyager guest stars Armin Shimerman and Harry Groener). He also appeared on several episodes of Babylon 5.
His film credits include Jurassic Park: The Lost World (1997), Galaxy Quest (1999), and Ocean's Eleven (2001). He voiced the character Zaeed Massani in the video games Mass Effect 2 (2010) and Mass Effect 3 (2012).
Sachs passed away from unknown causes on 1 February2013, his body being discovered on what would have been his 62nd birthday.