Al-Mukhaini began his career with Al-Hara, where he gained the nickname "Ibrahim Buffon" after Italian goalkeeper
Gianluigi Buffon. He then moved to
Al-Ouruba, breaking into the first team for the 2014/15 season, leading to a national team callup. He participated in the
2016 AFC Cup with Al-Ouruba, who finished last in Group B, winning one game against
Al-Wahda (Syria), and tying
Shabab Al-Dhahiriya (Palestine). He then moved to Al-Nahda in 2019, renewing his contract in 2020. The team finished second in 2021/22, before winning the league in 2022/23. The team also won the
Sultan Qaboos Cup in 2022/23. After a 3–2 victory over
Al-Khaldiya (Bahrain) in the West Asia zone play-off qualifier, Al-Nahda secured a spot in the group stage for the
2023-24 AFC Cup. == International career ==