During his young age, DeObia was interested in acting and he finally accomplished this dream in the early 1990s. He made his acting debut in 1992 by starring the role of Arthur in an American science-fiction horror film Alien 3. After a decade later, he was seen playing the role of Le Chocolat in an Australian–American pseudo-pastiche jukebox musical film Moulin Rouge!. He got his rise in fame in 2011 after he played the role of Gunner in an American fantasy swashbuckler film Pirates of the Caribbean: On Stranger Tides. He is also critically acclaimed for starring the role of Areo Hotah in an American fantasy drama television series Game of Thrones. Till date he has appeared in several movies and TV shows. His net worth is unknown. His nationality is English and he has black ethnicity.