Movies:
* The Scorpion King (2002): He played the role of "The High Priest."
* The Chronicles of Riddick (2004): He portrayed the character "Lord Marshal."
* Doom (2005): He starred as "Sergeant "Mac" MacKenzie".
* The Other Side of Heaven (2001): He played "Elder Poulsen".
* The Sisterhood of the Traveling Pants (2005): He had a role as "Joe".
* The Sisterhood of the Traveling Pants 2 (2008): He reprised his role as "Joe".
* The Fourth Kind (2009): He appeared as "Dr. Abigail Tyler."
* The Last Airbender (2010): He played the villainous character "Admiral Zhao".
* The Rum Diary (2011): He starred as "Sal."
* The Last Exorcism (2010): He played the role of "Reverend Cotton Marcus".
* The Last Exorcism Part II (2013): He reprised his role as "Reverend Cotton Marcus".
* The Call (2013): He played the role of "Detective "Doug" Davies".
* The Lazarus Effect (2015): He appeared as "Frank".
* The Bye Bye Man (2017): He played the role of "Dr. "J" Jenson".
Television Shows:
* Star Trek: Voyager: He guest starred in an episode as "Caretaker."
* Buffy the Vampire Slayer: He had a guest appearance as the character "Drusilla".
* The Shield: He guest starred in an episode.
* ER: He had a recurring role as Dr. "Ray Barnett".
* CSI: Miami: He appeared in an episode.
* Without a Trace: He played a character in a recurring role.
* The Mentalist: He had a recurring role as "Red John."
* Supernatural: He appeared in an episode.
* Grimm: He starred as the character "Captain Renard."
* Hawaii Five-0: He had a guest appearance in an episode.
* The Magicians: He had a recurring role.
* The Man in the High Castle: He appeared in an episode.
* The Blacklist: He had a guest appearance in an episode.
* MacGyver: He appeared in an episode.
* The Good Lord Bird: He played the role of "John Brown."
* The Flash: He had a guest appearance in an episode.
* The Rookie: He had a guest appearance in an episode.
This is not an exhaustive list, as he has appeared in many other projects throughout his career.
Deobia Oparei is known for his diverse range of roles, often playing characters with strong personalities and complex motivations. He continues to be a prominent figure in film and television.