Rev Youn arrived Cameroon in 1987 to work as missionary with the Presbyterian Church in Cameroon. On 11 August 1987, he decided to plant the Korean mission in Cameroon.
While awaiting recognition by the State, his mission continued to function under the cover of the Presbyterian Church in Cameroon. During its early missionary days in Cameroon, the Korean mission worked with the Presbyterian Church in Cameroon and contributed in the building of two PCC churches in the North West and South Provinces of Cameroon.

On 11 March 1991, the Mission of the Korean Church in Cameroon was authorised to operate as a Church in Cameroon according to Presidential Decree No. 91/159. A year later, the Mission was renamed Mission of the Evangelical Church in Cameroon (MECC) and confirmed by Order No. 3923/L/MINAT issued on 15 June 1992 by the Minister of Territorial Administration.

MECC runs some 60 churches in the Centre, South West, Littoral, West, East and Northern Provinces of Cameroon. MECC also administers a medical clinic and a mission centre in Yaounde.

The Cameroon Faculty of Evangelical Theology, the academic branch of MECC , offers courses in English and French leading to undergraduate and postgraduate degrees. Students from 6 African nations are currently enrolled in the faculty. The faculty is headed by Professor Michael Bame Bame, who served for 13 years as dean of the Yaounde Faculty of Protestant Theology.