Auxiliary Bishop Deepak Valerian Tauro was born on 2nd August, 1967, at Chikmagalur, Karnataka. He did his Minor Seminary at Muzaffarpur, Bihar, and studied Philosophy at Morning Star College, Kolkata. After 2 years regency, he completed his Theology at St. Albert's College in Ranchi and was ordained Priest on 10th May, 1996, for the Diocese of Muzaffarpur, Bihar.

On 16 July 2021 His Holiness Pope Francis has appointed Fr. Deepak Valerian Tauro of the Clergy of Muzaffarpur, as Auxiliary Bishop of the Archdiocese of Delhi, assigning him the Titular See of Buleliana. The appointment was made public on 16 July 2021 at 3.30pm.

He obtained a Masters in Spirituality and Counselling from Dharmaram Vidya Kshetram, Bangalore (2005). He served in the following ministries: Asst. Parish Priest at Samastipur (1996-1997); Asst. Parish Priest at Bettiah (1997-1999); Rector of the Minor Seminary, Muzaffarpur (1999-2002 and 2005-2007); Secretary to the Bishop (2007-2010); Vice Director and Director of Diocesan Youth Forum (2007-2011); Regional Secretary of CDPI (2009-2011); Rector of the Minor Seminary, Muzaffarpur (2010-2011); Professor and Spiritual Director at St. Albert's College, Ranchi (2011-2015). Since 2012, he has been Secretary of Bihar, Jharkhand and Andaman's Bishops Council (BIJHAN) and since 2015, Rector of St. Albert's College, Ranchi (re-elected for a second term).