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.