Youmanly committed his life to full time ministry in 1992. He served his childhood church until 2010, and went on to plant four new churches. From there Youmanly stepped into leading Umthlong Christian Church, from which 12 new churches have been planted 26 churches have been planted in several states of India.
In January 2017, Youmanly joined the NewThing team to lead the Central Asia team.
Youmanly is married to Greta. Together they have one son, Aldridge Mervyn.