Growing up in New York, Theo Rossi studied acting at the Lee Strasberg Theatre Institute. Making his TV debut with a recurring role on the David E. Kelley series "Boston Public" (Fox, 2000-04), he established himself as a working character actor by appearing in episodes of "Malcolm in the Middle" (Fox, 2000-06), "NYPD Blue" (ABC, 1993-2005), "American Dreams" (NBC, 2002-05), "Veronica Mars" (UPN/The CW, 2004-07), "Lost" (ABC, 2004-2010) and "Grey's Anatomy" (ABC, 2005-) before his first major film role in found footage sci-fi creature feature "Colverfield" (2008). This was swiftly followed by landing a role in "Sons of Anarchy" (FX, 2008-2014) as outlaw biker Juan Carlos 'Juice' Ortiz. Despite the commitments of taking a lead in a major series, Rossi continued to guest star on other shows including "Terminator: The Sarah Connor Chronicles" (Fox, 2008-09), "CSI: Miami" (CBS, 2002-2012) and "Law & Order Special Victims Unit" (NBC, 1999-). Off screen Rossi became known for his philanthropic work, as an Ambassador for the Boot Campaign, a charity offering support to wounded soldiers and ex-military service men and women suffering with Post Traumatic Stress Disorder. After Hurricane Sandy hit New York, Rossi co-founded the Staten Strong project which helped rebuild homes destroyed by the storm. He also became a spokesperson for a Humane Society campaign concerning the treatment of 'street dogs' in 2014. Rossi set up production company Dos Dudes Pictures in 2014 producing and starring in their first feature "Bad Hurt" (2015).