Mansoor was one of eight participants WWE scouted during a tryout in Jeddah ahead of 2018's WWE Greatest Royal Rumble, and was offered additional training at the WWE Performance Center. He was featured in a segment during the Greatest Royal Rumble where he and fellow recruits got physical with Iranian WWE Superstars Shawn Daivari and Ariya Daivari. He made his debut in WWE NXT under the name Mansoor on September 6, 2018, in a losing effort against Luke Menzies. He picked his first win on January 10, 2019 by defeating Rik Bugez. He won the 51-Man Battle Royal at the 2019 Super Showdown by last eliminating Elias. His next television appearance came on the 1 May episode of NXT UK, losing to Travis Banks.
At Crown Jewel, he defeated Cesaro in his hometown. On November 9, 2019, he made his debut on 205 Live where he defeated The Brian Kendrick. At Super ShowDown, Mansoor defeated Dolph Ziggler. Following this, Mansoor became a regular on 205 Live, developing a winning streak on the show by defeating the likes of Ashante "Thee" Adonis, Brian Kendrick and Jake Atlas. On the February 25, 2021 episode of WWE Main Event, Mansoor made his debut on the show defeating Drew Gulak. On the May 3 episode of Raw, Mansoor was assigned to the Raw brand. He made his in-ring debut the same night, losing to Sheamus by disqualification due to interference from Humberto Carrillo. In June, Mansoor began a storyline with Mustafa Ali, leading to a match on the July 5 episode of Raw, where Mansoor suffered his first pinfall loss, as Ali outsmarted him by faking a knee injury. On the July 26 episode of Raw, Mansoor teamed with Ali, where they defeated T-Bar and Mace.
As part of the 2021 Draft, Mansoor was drafted to the SmackDown brand. On the October 11 episode of Raw, Mansoor was attacked by Ali backstage after they lost to The Hurt Business, ending their alliance between the two. Ali would challenge him to a match at Crown Jewel later that night. At the event, Mansoor defeated Ali.
On April 22, 2022 in a dark segment before SmackDown, Mansoor was announced as the newest member of LA Knight's stable, Knight Model Management, alongside Mace, thus turning heel for the first time in his career. On the July 1 episode of SmackDown, Mansoor officially appeared alongside Mace as part of Knight's (now known as Max Dupri) stable, Maximum Male Models, under the tweaked name, mån.sôör. Maximum Male Models later welcomed Maxxine Dupri, Max's sister, to manage the team. Maximum Male Models joined the Raw brand on February 6, 2023 and remained on Raw following the 2023 WWE Draft. After weeks of spending time with Otis of Alpha Academy, Maxxine left Maximum Male Models to join Otis and Chad Gable on the May 15 episode of Raw when she cheered them on after eliminating ma.çé and mån.sôör in an Intercontinental Championship number one contender's battle royal. On September 21, both ma.çé and mån.sôör were released from their WWE contracts.