Jimmy Havoc trained at NWA UK Hammerlock under Andre Baker and Jon Ryan, alongside the likes of Zack Sabre Jr. and Fergal Devitt before making his debut in 2004.

[8] On 4 October 2016, it was announced that Jimmy Havoc would be making his Canadian debut for Smash Wrestling on their 4th Anniversary Tour in November 2016.

On 1 April 2012, Havoc made his debut for Insane Championship Wrestling, at 'So's Yer Maw' in The Garage, tagging with Iceman against Jack Jester & Chris Renfrew.

Shortly after this, Havoc was at odds with the New Age Kliq, first competing in tag team match alongside Jack Jester, that was deemed too violent to air on YouTube.

As the rivalry continued, Jimmy defeated BT Gunn in ICW's first ever Thumbtack Kickpad match, for the right to face Rhyno at Fear & Loathing VI.

In November 2013, at Chapter Nine, Havoc attacked promoter Jim Smallman, and aligned himself with the London Riots, turning heel in the process.

In his first title defense at Chapter Eleven, Havoc defeated Zack Sabre Jr. with the help of his newest associate, Progress trainee "The Omega" Isaac Zercher.

Havoc was joined at Chapter Thirteen by Paul Robinson, and the group later christened themselves "Regression" as a play on the name of the company and to symbolize their hatred of Progress Wrestling.

Havoc eventually lost the title at Chapter Twenty to Ospreay in a no disqualification match, with his 609-day reign equaling that of all previous champions combined.

After the match, a beaten and bloody Havoc was helped to his feet by Smallman, his longtime nemesis, and left the Electric Ballroom to a thunderous standing ovation from a respectful crowd.

Havoc would cost Scurll the title whilst saving Smallman from an attack from the then-champion, turning face again in the process.

[13] At Chapter 39, he defeated Scurll by DQ, thus advancing to a 7-way elimination match for the vacant Progress championship making to the final two but lost to Pete Dunne after Tyler Bate attacked him.

[14] At Chapter 40 Havoc defeat Scurll in a No Disqualification match, ending their feud and becoming the number one contender to the Progress World Championship.

Ospreay initially accepted, but then brutally attacked Havoc alongside Paul Robinson, turning heel and restarting their feud.

[18] In May, Havoc entered the Super Strong Style 16 tournament, but was eliminated in the first round by the eventual winner, Travis Banks.

At Chapter 54 they were forced to team again against rivals Pete Dunne and Travis Banks in a losing effort, when Havoc walked out on Haskins.

[20] In the following chapter, Jimmy joined with Haskins and his wife to form a new faction by attacking a defenseless Jack Sexsmith who was then saved by David Starr.

After failed to regain the championships at Chapter 65, Havoc and Haskins would ally with Morgan Webster, starting a victory streak in six man tag team matches.

He would finally defeat Ricky Shane Page in an ECW rules match at the first night of the Coust to Coast tour on the USA.

On 4 March, Havoc teamed with Big Damo for TNA's One Night Only: Joker's Wild pay-per-view losing to Drew Galloway and Mike Bennett.

On the edition of 9 February 2018 of Defiant's YouTube show, Havoc defeated his tag team partner to win the Hardcore Championship.

On 26 March, at Road to No Regrets, in a rematch they would beat Aussie Open and the team of Joe Coffey and BT Gunn to capture the tag titles.

[30] He later joined Promociones Dorado and began being promoted by Salina de la Renta and also started feuding with Mance Warner.

On 9 November 2019, it was reported that Havoc had an altercation with Excalibur at Tony Schiavone's birthday party, which was being held at Jimmy's Famous Seafood in Baltimore.

They defeated SoCal Uncensored's Frankie Kazarian and Scorpio Sky in a number one contender's match for the AEW World Tag Team Championship on 2 May.