The Tangkhul churches under the banner of the Tangkhul Naga Baptist Convention (TNBC) held its Executive Meeting at Lunghar on September 4-6, 1959, and there they resolved to send a preaching team led by Revd. Phanitphang Vashum, the then Executive Secretary of TNBC; Revd. K. Ringshi, Field Director, ETNBA and STNBA; and Revd. K. Mingthing, Plain Missionary of TNBC. After a month of their preaching tour, the TNBC convened its Executive Meeting again at Talui (Tolloi) on January 27-31, 1960, where the passionate Tangkhuls decided and resolved to adopt the Maring tribe as the main part of the TNBC Mission Project. Revd. K. Ringshi of Bungpa Khunou Baptist Church was appointed as the Field Director of the aforementioned project from 1960 to 1969. He was succeeded by S. Angpham of Yamolching, who was the first native Field Director of TNBC Maring Mission Field from 1969 to 1974. He was succeeded by another Tangkhul man, Nk. Paul, from Phungyo Baptist Church, NTNBA, who rendered his service as the Field Director of the said project from 1974 to 1975. He was succeeded by Revd. S. Angpham who became the full-fledged Executive Secretary of the Maring Naga Baptist Association (MNBA) in 1975. He rendered his service to the association as the Executive Secretary till 1983. He was succeeded by Revd. Ns. Mochao of Narum Baptist Church who served as the Executive Secretary from 1984 to 1994. Revd. MM. Ko-untim Hormi of Sabol Baptist Church succeeded him and served the association as the Executive Secretary from 1994 to 2003. He was succeeded by Revd. T. Modungkhul of Langol Baptist Church who served the association as the Executive Secretary from 2004 to 2013. After him, the association was headed by Revd. K. Moses of Machi Baptist Church, who served the association as the Executive Secretary from 2014 to 2018. Revd. Y. Modarshim of Langol Baptist Church succeeded him and rendered his service to the association as the Executive Secretary from January 2019 to April 2020. Then Revd. D. Shong-in of Lamlong Khullen Baptist Church took charge of the association as the Executive Secretary from May, 2020 till date.
The chronology of Field Directors/Executive Secretaries is stated below:
| Sl. Nos. | Field Directors/Executive Secretaries | Churches | Designations | Period(s) |
| 1 | Rev. K. Ringshi | Bungpa Khunou Baptist Church | Field Director | 1960-1969 |
| 2 | Rev. S. Angpham | Yamolching Baptist Church | Field Director | 1969-1974 |
| 3 | N.K. Paul | Phungyo Baptist Church | Field Director | 1974-1975 |
| 4 | Rev. S. Angpham | Yamolching Baptist Church | Executive Secretary | 1975-1984 |
| 5 | Rev. Ns. Mochao | Narum Baptist Church | Executive Secretary | 1984-1994 |
| 6 | Rev. MM. Hormi Ko-untim | Saibol Baptist Church | Executive Secretary | 1994-2004 |
| 7 | Rev. T. Modungkhul | Langol Baptist Church | Executive Secretary | 2004-2013 |
| 8 | Rev. K. Moses | Machi Baptist Church | Executive Secretary | 2014-2018 |
| 9 | Rev. Y. Modarshim | Langol Baptist Church | Executive Secretary | 2019-2020 |
| 10 | Rev. D. Shong-in | Lamlong Khullen Baptist Church | Executive Secretary | 2020-till |