[1] He is the Convenor of the Forum for Naga Reconciliation,[2] and a former Vice President of the Asia Pacific Baptist Federation.
On Aier's ministry, Chongpongmeren Jamir writes that he was the first Naga theologian to "clearly expound the need for socio-political engagement of the church" in society.
In his 1989 book, A Cry from the Rice Fields: A call of freedom for the Nagas, Aier wrote,"The Church must witness with more than words.
Through the life, service and, sacrifice of their members, they must make their contribution to justice and peace, to the improvements of human conditions, and to the care of the needy and of the homeless.
[1]In 1991, the Nagaland Baptist Church Council gave Aier the responsibility to start and build the Oriental Theological Seminary (OTS) from scratch.
Wati Aier cooked for the students joined them for weekly football matches and played the trumpet in the seminary choir.
[11] In March 2011, Aier was selected for the Baptist World Alliance Denton and Janice Lotz Human Rights Award 2010.