After completing a licentiate course in theology in 1965, Krupa Rao began pastoring Nellimarla parish from 1965 to 1968.[1] Again from 1973 through 1976, he pastored the Andhra Baptist Church - Jagannaickpur[2] parish in Kakinada.
In 1976,[1] Krupa Rao became a Spiritual Formator at the Protestant Baptist Theological Seminary, Kakinada where aspirants enroll to discern their avocation towards priesthood. Rao, together with his other companions, The Rev. G. Novahu Raju and The Rev. C. L. Johnson used to spiritually guide and mentor the aspirants. Later, Rao also led the seminary as Principal[5] succeeding Gordon Dewolfe Barss. During Rao's tenure, he also took up the role of a Vocation Promoter guiding youth towards Priesthood enabling them not only to take up propadeutic courses and being their Spiritual Confessor but also enabling the aspirants to turn their ministerial calling into a perpetual profession and continue their spiritual studies at the Protestant Regional Theologiate in Hyderabad in which the Convention of Baptist Churches of Northern Circars is a participating member.
As a member[1][4] of the Council of Christian Hospitals, Krupa Rao took part in the management of the medical institutions founded by Canadian Baptist Ministries, namely,
Krupa Rao used to represent the Council of Christian Hospitals in the Association and Council of the Christian Medical College & Hospital, Vellore.[1][4] Krupa Rao was also a member[4] of the Christian Medical Association of India.
Krupa Rao, as a member of the Seminary Council of the Baptist Theological Seminary, Kakinada, represented the Convention of Baptist Churches of Northern Circars Society on the Board of Governors of the near-ecumenical Andhra Christian Theological College, a Protestant Regional Theologiate situated in Secunderabad which had a four-member representation on the faculty from the CBCNC during that period, namely, K. David,[10] G. Babu Rao,[11] K. D. G. Prakasa Rao and D. J. Jeremiah.[12] In the course of time, Krupa Rao became the Chairperson[1] of the Board during 1990-1992 where he held a name for himself and was able to steer clear of controversies much like his Spiritual Confessor, A. B. Masilamani.
In 1990 during the rotation of Principalship from Samavesam of Telugu Baptist Churches Society to the Andhra Evangelical Lutheran Church Society, Krupa Rao played a notable role. It was the Samavesam of Telugu Baptist Churches Society which held the Principalship from 1986 through 1990 on a 4-year rotation basis and was then supposed to pass it on to the Andhra Evangelical Lutheran Church Society but lack of quorum at the Board of Governors meeting of the Andhra Christian Theological College, Hyderabad made the decision to prolong. As the day progressed, Krupa Rao, as Chairperson of the Board of Governors together with Governor Ryder Devapriam ensured that efforts were made to maintain a proper quorum resulting in holding of the Board of Governors meeting which then resolved to pass on the 4-year cycle of Principalship to the Andhra Evangelical Lutheran Church Society. Suppogu Joseph was the outgoing Principal while M. Victor Paul was the Principal-designate during 1990. Incidentally, both Suppogu Joseph and M. Victor Paul happened to tutor Krupa Rao during his upgrading studies at Andhra Christian Theological College at its erstwhile campus at Rajahmundry.
As a Branch Secretary of the Bible Society of India Andhra Pradesh Auxiliary, Krupa Rao was instrumental in taking forward the Bible cause. In 1977, Krupa Rao became a member of the Bible Society of India Andhra Pradesh Auxiliary Committee and later became a member of the Executive Committee[1] of the Bible Society of India Central Office in Bangalore. During Krupa Rao's stint at the Bible Society, he worked closely with his companion Lella Prakasam, then Auxiliary Secretary stationed at the Bible House, Secunderabad who also happened to hail from the Convention of Baptist Churches of Northern Circars.
| Educational offices
|
| Preceded by |
Principal, Eva Rose York Bible Training and Technical School for Women, Tuni, Andhra Pradesh 1989-1993 |
Succeeded by |
| Academic offices |
| Preceded by |
Principal,[5] Baptist Theological Seminary, Kakinada, Andhra Pradesh 1976-1993 |
Succeeded byC. L. Johnson, CBCNC1993-2014 |
| Honorary titles
|
Preceded byS. Benjamin, STBC1988-1990 |
Chairperson, Board of Governors, Andhra Christian Theological College, Secunderabad, Telangana 1990-1992 |
Succeeded byT. Anantham, SALC1992-1993 |