Ansar Hussain Firdousi did his initial studies in Al-Jaamiathul Firdousiya Arabic College, Nagercoil. He, then, graduated as Afzal ul Ulama from Bharathidasan University, Tiruchirappalli. He received his Master in Modern Arabic from Madras University, Chennai.
Ansar Hussain Firdousi served as the Imam and Khateeb of Masjid Jamiat Tawheed, Chennai and taught Islamic Studies at Unity Public School, Chennai. He was also a daee at Kuwait Dawah Center.
Sheik Ansar Hussain has been delivering talks in various places in Tamil Nadu, Sri Lanka and the Gulf in his quest to learn and teach the Deen in its pristine form as it was revealed to the Prophet Muhammad (Peace be upon him).