Joshua "TriMaster" Niven is an American Terran player currently playing for compLexity Gaming.
 Wings of Liberty
 2011 MLG Raleigh
TriMaster made a strong showing in the open bracket of the 2011 MLG Raleigh, defeating players such as HwangSin, Jinro, and KawaiiRice. He eventually landed in Pool A in which he defeated iNcontroL 2-0 in his first match. He ended up finishing 5th in his pool after being unable to pick up another victory.
In the championship bracket he went on to beat HayprO and IdrA before getting eliminated by HuK.
 2012 MLG Summer Championship
TriMaster defeated MarineKing 2-0 in the last round of the Open Bracket Winners to secure a spot in pool play, but 0-2's against HerO, qxc, and asd knocked him out of the tournament in Championship Bracket Loser's Round 1.
- TriMaster has a younger brother, under the name SniXSniPe, who is also playing Starcraft II as a member of compLexity Academy.
- Both he and his brother are right-handed, but play left-handed because when they were children, they used to play a lot on their father's computer, who is left-handed.
- A notable bit of controversy was ignited after IdrA's series against TriMaster in the Championship Bracket of MLG Raleigh 2011. After the third game, IdrA left without a gg, audibly and forcibly smashing his headset against his keyboard. His F4 key popped off and was picked up by a redditor who later gave it to TriMaster. 
- At MLG Raleigh 2011, DongRaeGu stated that he considers TriMaster one of the top foreigners along with HuK, ThorZaIN and KiWiKaKi.
- compLexity Gaming has produced a movie documenting his success in MLG Raleigh 2011: Link