Muhammad Al-Qaasimy bin Abdul Rahman was born to parents, Abdul Rahman, his father, and, Habibullah Aman, his mother, in Singapore. He has an elder brother, Al-Kautsar. Qaasimy was introduced to football by both his father and brother and claimed it was the only sport introduced to him at a young age. His passion for football grew from then on and told his father that he wanted to go on and pursue football. Qaasimy won many trophies in his primary school and his teacher saw his potential and recommended his father to apply Qaasimy into the Singapore Sports School where he develop into his full potential. From then on that his father agreed Qaasimy's choice to pursue football and applied to the Singapore Sports School.
Club career
Early career
Qaasimy started out as a striker before being converted into a right-back during his time in the NFA. He could play on both flanks of the fullback position while being on the right is his main and favourable side. After graduation from the Singapore Sports School, he had a burnout and lost passion for the game and almost quit his football path which he set on while at a very young age. He agreed to play for the Young Lions when they called him up to sign with them, "giving it a last go" before making a final decision on his career path. From then on, his career as a footballer skyrocketed and his passion for the game came back even stronger and decided to remain a footballer.
Young Lions
Having graduated from Singapore Sports School, Al-Qaasimy joined the Young Lions at the age of 18 whilst continuing his studies in Republic Polytechnic, a local tertiary institution. In his third season at the club, he was named as captain of the team at the start of the 2013 S.League season, succeeding from Hafiz Abu Sujad.
In the 2016 season, Al-Qaasimy joined the Eagles from LionsXII. He was often deployed as a left full-back due to Faritz Hameed taking on the right. Al-Qaasimy was often dubbed by many people, the offensive full-back. He made his debut for the team in the first game of the 2016 S.League season, in a 3-3 draw with Tampines Rovers. Al-Qaasimy scored his first ever professional goal in Geylang's first match of the 2017 S.League season, helping his side to a 2-0 victory over Balestier Khalsa FC.
International career
Al-Qaasimy was named as the captain for the Singapore national under-23 football team that was to take part in the 2015 Southeast Asian Games to be held in Singapore. He also had prior experience in leading a squad at the international level, having had captained the under-22 side in 2012 for the AFC Under-22 qualifiers. He was given his first cap for the senior team by Bernd Stange in a 2-1 win over Papua New Guinea and earned 5 caps before he was called up to the disappointing 2014 AFF Championship side that failed to launch a decent defence of their title.
