Korea National Training Center, also known as the Taereung Training Center, located in Gongneung-dong, Nowon-gu, in the northeast part of Seoul, is the only national athletic training center of South Korea.
The Yakima Training Center (YTC) is a United States Army training center, used for maneuver training, Land Warrior system testing and as a live fire exercise area.
 It is located in the south central portion of the U.S. state of Washington, bounded on the west by Interstate 82, on the south by the city of Yakima, on the north by the city of Ellensburg and Interstate 90, and on the east by the Columbia River.
 It is a part of Fort Lewis.
 It comprises 327,000 acres (132,332 hectares) of land, most of which consists of shrub-steppe, making it one of the largest areas of shrub-steppe habitat remaining in Washington state.
 The terrain is undulating and dominated by three east-west parallel ridges, the Saddle Mountains, Manastash Ridge, and Umtanum Ridge anticlines, which are part of the Yakima Fold Belt near the western edge of the Columbia River Plateau.
 Vegetation consists of sagebrush, bitterbrush, and bunch grass.
 Vagabond Army Airfield and Selah Airstrip are located on the Yakima Training Center.
 The training center is also used by the Japan Ground Self-Defense Force for exercises.
Camp Allen, is a small United States Marine Corps base in Norfolk, Virginia, a satellite of the Naval Station Norfolk.
 In 1942 the Chief of the Bureau of Yards and Docks wanted the first Seabee training center close to an existing Naval training facility with Norfolk being chosen because of the available land that could be purchased.
 On 25 March 1942 the Commandant of the 5th Naval District announced that the U.S. Naval Construction Training Center, Naval Operating Base Norfolk had been commissioned 4 days prior.
 The base was named Camp Allen in memory of the CEC Captain Walter H. Allen founder of the naval construction regiment at Great Lakes Naval Training Center during WWI.
 It is now home to both the 1st and 3rd Fleet Antiterrorism Security Team (FAST) Companies.
 The base also houses a supply warehouse, battalion aid station, and a motor transport unit.
 All units are members of the Marine Corps Security Force Regiment, headquartered aboard Naval Weapons Station Yorktown.
Grudge Training Center (GTC) was a mixed martial arts training center founded by coach Trevor Wittman in 2009.
 Originally located in Wheat Ridge, Colorado, GTC relocated to Arvada, Colorado in 2013.
 The gym was an affiliate of Jackson's Submission Fighting.
 To devote more attention to his sports equipment company ONX Sports, Wittman closed Grudge in November 2016, with Grudge trainer Jake Ramos opening the Genesis Training Center to assume most of Grudge's former personnel, membership and operations.
Akuressa Training Center of National Youth Service Council is one of Main Vocational Training Center in Sri Lanka.
 It was the Hub of ICT Training center in Akuressa area.
 located in Matara district - .
Trevor Wittman (born March 5, 1974 in Denver, Colorado) is an American boxing and MMA trainer.
Heath Sims (born October 14, 1971) is an American mixed martial artist, Olympic wrestler and MMA trainer.
 He is a long time training partner of Dan Henderson and a highly respected MMA coach who was the wrestling instructor for the US team on .
The US Coast Guard Training Center (TRACEN) in Yorktown, Virginia is one of four major Coast Guard training facilities in the United States.
 The others are Training Center Petaluma, Training Center Cape May and the Aviation Technical Training Center, located in Elizabeth City.
 TRACEN Cape May is the only US Coast Guard Base used for Basic Military Training or "boot camp".
 TRACEN Yorktown, TRACEN Petaluma and the Aviation Technical Training Center are locations for Coast Guard's apprentice level "A" and advanced level "C" Schools.
The UPMC Sports Performance Complex is a multipurpose, multisport training, sports science, and sports medical complex of the University of Pittsburgh Medical Center.
 The complex is located along the shore of the Monongahela River in Pittsburgh, Pennsylvania and is unique in that it is the only facility in the United States housing the practice and training facilities for both a collegiate NCAA football team and a professional National Football League team, the University of Pittsburgh Panthers and Pittsburgh Steelers respectively.
 It is also unique in that it combines these training facilities in one location with an academically based sports science and medicine program.
 The complex consists of four centers which include the Center for Sports Medicine, Sports Training Center, Indoor Training Center, and the Fitness and Conditioning Center located in three buildings along with four outdoor practice fields all situated on 40 acre of land.
 The UPMC Center for Sports Medicine located in the complex is an international destination for amateur and professional athletes alike for its training, medical, and rehabilitation studies and services.
Tiger Smalls (born Priest George Youngs Smalls on March 2, 1969) is a professional American boxing trainer who formerly held the World Boxing Organization Inter-Continental Featherweight title and North American Boxing Organization Featherweight title, as well as the Universal Boxing Association world featherweight title.

Question: What is the name of the American Boxing and MMA trainer who founded Grudge Training Center in 2009?
Answer: Trevor Wittman