[8] Lancaster has cited Proceed as the inspiration behind his career in production, as he began self-producing their material which eventually led to producing for other artists.

"[9] Lancaster's early work in production and mixing included records for Lower Than Atlantis,[10] Oceans Ate Alaska[11] and Mallory Knox.

[14] The following year, he worked with Mike Duce from Lower Than Atlantis to co-write and produce the song "Heartache on the Big Screen" for 5 Seconds of Summer, a B-Side to their breakout single "She Looks So Perfect".

[28] Other projects completed in this time include mixing the songs "American Attraction" and "Casualty" from Anti-Flag's tenth album American Fall (November 2017),[29] Hollywood Undead's fifth albumV,[30] and mixing the songs "Lovesick", "Heartbroken", and "Midnight" from You Are Someone Else (March 2018), the debut album by British indie-pop band Fickle Friends.

[34] When Bring Me the Horizon were commissioned to write a song for the soundtrack to Hideo Kojima's video game Death Stranding, Lancaster was again drafted in to provide additional production and mixing to "Ludens", all of which was completed in a mixture of a studio and hotel room in Bologna, Italy while the band were on tour, with a deadline of just a few hours at times in the mixing stage.

[39] He continued to work with Don Broco by mixing the standalone single "HALF MAN HALF GOD" as well co-writing, producing and mixing their super-group single "ACTION" which featured Takahiro Moriuchi (One OK Rock), Tyler Carter (formerly of Issues), Caleb Shomo (Beartooth) and Tilian Peason (Dance Gavin Dance).

[42] In 2020, Lancaster began his year by once again working with Bring Me the Horizon, this time mixing the lead single "Parasite Eve" from their October 2020 EP Post Human: Survival Horror.

Lancaster was the subject of an episode of a documentary that the band filmed to showcase the challenges of making music remotely during the COVID-19 pandemic lockdown measures put in place in the UK.

"[49] In 2022, Lancaster mixed the single "Won't Stand Down" by the rock band Muse, and joined them on their Will of the People tour, providing keys, percussion and guitar.

[50] Since the end of his previous project with post-hardcore band Proceed in 2012, Lancaster began posting clips of his own solo music on his Instagram in 2016.

[51] After multiple clips of teaser footage for new music, Lancaster released his debut solo single "Move A Mountain" in August 2018 via Raw Kingdom with support from AWAL.

"[52] Lancaster followed "Move a Mountain" with single "Wild Life" in September 2018, before his debut solo headline show at Oslo in London in October 2018.