The son of Azeez Mohamed Mubarak, a first-class cricketer himself and later a prominent scientist, Mubarak was born in Washington, D.C., making him, with West Indian Ken Weekes, one of only two Test cricketers born in the United States. His family soon returned to Sri Lanka, however, where he was educated at Royal College Colombo, winning the coveted Royal Crown for cricket and colours in water polo. He holds a degree in Physical Science from University of Colombo. Mubarak was initially spotted at a Cricket training camp in Dambulla by former players Arjuna Ranatunga and Aravinda de Silva, and subsequently labeled one of the brightest future stars of Sri Lankan cricket,.

Mubarak started his sporting career as a swimmer and then became a cricketer. He swam for Royal College and competed at National Level swimming competitions by representing his alma-mater. Mubarak specialized in short distance swimming and won the national championship in 50 meter butterfly stroke. In 2006–2007 Jehan swam for Sri Lanka National Swimming meet and after finishing his semi-final heat he opt out from final event to participate in Sri Lanka national cricket team practice. Mubarak also led the Royal College Water Polo team during his time at Royal College.

Mubarak was involved in an accident on 22 April 2012 while driving back from Wilpattu National Park; he was arrested and later acquitted as the result of a head-on collision which killed a motorcyclist.

After being a prolific run scorer in school yard cricket, though only playing a handful of first class games, Mubarak was eliciting comparisons to West Indian cricket icon Brian Lara for not only his graceful batting style but also for his ability against spinners.

In July 2009, Mubarak was selected to captain the Sri Lanka Board XI against India.

In August 2009, he scored 160 for Sri Lanka A against Pakistan A and in September 2009 he captained and guided Sri Lankan domestic champions Wayamba to the Champions League in India.

Debut

In July 2002 he made his Test debut against Bangladesh, and in November 2002 he made his ODI debut against South Africa and participated in the 2003 World Cup hosted by South Africa.

After his debut Ranjit Fernando stated on air that Mubarak's batting was "poetry in motion" and that he should be given more responsibility in order to improve the professionalism of the Sri Lankan cricket team.

Decline

In June 2005 however, three years aft