Essajee is a known academician in the field of Accounting specializing in Financial accounting and reporting and has in the past served on both the Professional Standards Committee and the Disciplinary Committee of the Institute of Certified Public Accountants of Kenya (ICPAK).

He is a lecturer at the School of Business-University of Nairobi where he teaches and supervises both undergraduate and post-graduate students. He has previously also lectured at the United States International University-Africa where he headed the Accounting & Finance Department. Essajee is also a consultant and renowned trainer in the area of financial accounting and financial analysis and lectures extensively on Islamic Finance within the Eastern Africa Region.

Essajee is a promoter of Islamic banking in Kenya, and co-founder and currently the Chairman of First Community Bank (the first fully fledged Sharia’h compliant bank to be approved in Kenya). He also served as its Executive Director in charge of support and control and later as its Managing Director, during his leave of absence from the University of Nairobi.

He serves as the treasurer of Jamia Mosque, Nairobi (the largest mosque in East and Central Africa and is an ex-officio of the Council of Muslim scholars of Jamia Mosque Nairobi. Essajee is also the Chief Editor of The Friday Bulletin (a weekly newsletter of Jamia Mosque Committee), Vice-Chairman of Tamaz Communications Limited operating Horizon TV (an Islamic TV station in Kenya), Patron of the Nairobi Area Muslim Students Association, Trustee of One Shilling Foundation, speaker on religious tolerance and national cohesion and hosts of two weekly Radio Islamic programs on Kenya Broadcasting Corporation.

Essajee is also an alumni of Pricewaterhouse Coopers and a member of the Institute of Directors of Kenya.