Omar Hajaj is originally from Yaffa (Jaffa) and born and raised in the UK. Omar studied Anthropology in university followed by gaining a BA degree from the faculty of Shariah in the Islamic University of Madina. During his time in Madina he studied Tafsir closely with Shiekh Abdullah Ibn Muhammed Al-Ameen Asshinqitee and Fiqh and Aqeedah privately with Shiekh khaled Afifi.

He has been involved with working with a number of Islamic organizations for over a decade, he was previously the general manager of the popular Islamic magazine - Al Jumuah, youth director of Al Muntada Al Islami, executive committee member of FOSIS and the PR manager at MRDF. Omar lead on national pro-justice campaigns in the UK. He is currently the founder and director of Yaseen Youth development, a non-profit organisation that aims to inspire the youth through life-changing programmes. Omar is one of the Imams, teachers and khateebs at West London Islamic Cultural Centre in Parsons green, London.

Omar has been active in the UK dawah, giving lectures across the country and abroad with a special focus to the youth. He has been holding Fiqh classes weekly since 2018 and does private counselling sessions.