[2][3][4] Upon graduating at the end of 2018, Mukhairi signed for Super League side PKNP on a one-year contract with an option for an extra year.

[2] He making his league and first team debut, against PKNS on 23 February 2019, at the age 17 years, three months and 16 days, coming on as a substitute in the 67th minute.

[7] By this time, his performance was soon attracting attention from several Malaysia Super League clubs, until he was approached by Selangor, who planned to sign him to their reserve team.

[citation needed] In his third season, Mukhairi began wearing the number 7 shirt for Selangor in 2022, signalling coach Michael Feichtenbeiner's intent to use him as his main box-to-box and playmaker.

He joined a famous list of players to wear the number 10, most notably the late Mokhtar Dahari, a legend striker of the squad who hold the record as the top scorer for the club with 177 goals.

On 23 September 2021, Mukhairi received his first call-up to the senior national team, for central training and friendly matches against Jordan and Uzbekistan.

[3] Upon Mukhairi's departure from PKNP in 2020, his former coach, Abu Bakar Fadzim stating that he "...as a young player who has a high level of intellectual intelligence (IQ), and he can even plan a match and think in a short period of time before making a pass".