In terms of scholarship, Sadananda is an authority on Johannine theology and has also contributed the history of the Basel Evangelical Mission by initiating research into Moegling's encyclopedia, Bibliotheca Carnatica[6] and Ferdinand Kittel's complete works.
[7] Sadananda's companions during his study years at Bangalore comprised B. D. Prasad Rao, H. R. Cabral and Jonadob Nathaniel, the present Director Translations of the Bible Society of India.
As an ecclesiastical figure, Sadananda was a member of the Dialogue Commission between the Vatican and the World Alliance of Reformed Churches He attended Commission meetings and presented papers at Amsterdam, Netherlands 1999, Rome, Italy 2000, Cape Town, South Africa 2001, Belfast, Northern Ireland 2002, Toronto, Canada 2003, Venice, Italy 2004.
2000 August - Audience and consultation with Pope John Paul II as part of the WARC-RC Dialogue Commission in Vatican and is also a member of the theological Network of the World Communion of Reformed Churches.
In April 2016 Sadananda was elected vice president of National Council of Churches in India, at the Jabalpur Assembly, for the quadrennial 2016-2020.
The Revised Book of Common Worship was accepted and authorised for general use in the CSI during Synod Session at Bangalore 2004.