Sheikh Morteza Ansari Dezfuli (also transliterated Mortaza Ansari and Murtada al-Ansari) (1781–1864) was a Shia jurist who was generally acknowledged as the most eminent jurist of the time. Sheikh Ansari has also been called the "first effective" model or Marja of the Shia or "the first scholar universally recognized as supreme authority in matters of Shiite law".

Sheikh Mustafa Jaffer pursued Islamic studies in Tehran, Iran, and also earned his masters degree in Arabic-English Translation and Interpretation from Edinburgh, Scotland. He has also led Hajj groups for the past 20 years and has delivered lectures to Muslim communities across six continents.

Sheikh Safdar Razi was born in Karachi, Pakistan, and raised in Dubai and Qatar. He has completed his BA in Islamic Law, a Master’s program in Religious Roots of Europe (RRE) and a Postgraduate diploma in Islamic Studies. He has been working with his congregation, churches, synagogues, and local law enforcement agencies in the US and Europe to facilitate religious understanding and tolerance.

 Shaykh Saleem Bhimji was born and raised in Canada. After completing his post-secondary education at the Northern Alberta Institute of Technology (NAIT), he moved to Medina, New York, to study at the Imam al-Asr Theological Seminary. He later continued his religious studies at the Hawza of Qum. To date he has translated over 40 full-length books into English that have been printed worldwide.