Jumeau was born in Hamilton, New Zealand. Raised by a single mother, his early childhood was a struggle and he got himself into trouble. He changed his life after losing his brother in a tragic accident, channeling his energy in pursuing "a life worthy of both of us" in MMA. To get into fighting comes easily with Luke as he believes "the warrior spirit lies within all New Zealanders". He works as a panel beater. Jumeau's fighting style began with boxing, a sport he pursued for several years before switching to mixed martial arts. He put 10 years into achieving his tae kwon do-based black belt.
Jumeau started his MMA career in 2008. He has fought international in New Zealand, Hong Kong, Australia, and Dubai in various promotions. "The Jedi" last fight before made it into UFC was at Legend MMA 1, competing against former UFC fighter, Vic Grujic, winning with TKO. He held a 6 winning streak – all stoppages, prior signed by Ultimate Fighting Championship.
Ultimate Fighting Championship
Jumeau made his promotion debut on 10 June 2017 at against Dominique Steele, in his home country New Zealand. Steele closely won the first round however, Jumeau was able to come back – nearly knocking out Steele in the second round, and dominating the third. He won the fight with unanimous decision. Jumeau faced Shinsho Anzai on 23 September 2017 at UFC Fight Night 117. He lost the fight by unanimous decision with the score board of. Jumeau faced Daichi Abe on his third fight on 11 February 2018 at UFC 221. He won the fight via unanimous decision. Jumeau was scheduled to face Geoff Neal on 2 December 2018 at UFC Fight Night 142. However, it was reported on early November, 2018 that Jumeau pulled from the card due to injury. Jumeau faced Dhiego Lima on 6 October 2019 at UFC 243. He lost the fight via split decision. Jumeau was released by the UFC on February 11, 2020.
Personal life
Luke prefers to use the moniker "Juggernaut" instead of "The Jedi" as he has heavy hands and is naturally strong. "The Jedi" was done by a local New Zealand promoter due to his calm and collective demeanor in the cage where a Star Wars theme video was made for him on the promotion.