Ha became a Presbyterian minister and a professor of historical theology at Korea Presbyterian Theological Seminary.
He teaches Biblical Exposition.
Ha established Korea Presbyterian Church and the Korea Presbyterian Seminary, serving as Pastoral General, Christian education, Missions etc.,
at his own expense.

His theological thought is inherited from the original church, unlike the Roman Catholic or Reformed Church, or of the Protestant church, which offer traditional Christian interpretation.
Ha presented the historical point of view of the Orthodox Church, describing how the confession of faith and the historical context coincide.
Ha is a poet, and a reformist theologian.
He debuted as a poet by the recommendation of fellow poet Park Jaesam and two others in Hankyoreh Literature Magazine in 1994.

President, Busan Social Information Forum (BSIF)(NPO, 2003~)
President, Busan Christian Writers Association (BCWA)(2013~)
Research Committee Member of the World Association of Korean Writers(2008~ )
President & Moderator(1st, 2nd), General Assembly of the Orthodox Presbyterian Church of Korea(2014-2017)
First President, Korea Presbyterian Theological Seminary (2012-2015)
Council Member of National Unification Advisory Council (2003-2007)
Expert Member(Unification Education) of Ministry of Unification (2004-2005)
CG & Chief Executive  of Hyundai PR Research Center (2004-2006)
CG & Chief Executive of Korea IT Cultural Content Research Institute (2003-2004)
First Vice Chairman, Korea Universities PR Association (1997)
Chief Editer, Pusan International Forum (Quarterly Academic journal, 1994-1997)
Ha became a Presbyterian minister and a professor of historical theology at Korea Presbyterian Theological Seminary. He teaches Biblical Exposition. Ha established Korea Presbyterian Church and the Korea Presbyterian Seminary, serving as Pastoral General, Christian education, Missions etc., at his own expense.
His theological thought is inherited from the original church, unlike the Roman Catholic or Reformed Church, or of the Protestant church, which offer traditional Christian interpretation. Ha presented the historical point of view of the Orthodox Church, describing how the confession of faith and the historical context coincide. Ha is a poet, and a reformist theologian. He debuted as a poet by the recommendation of fellow poet Park Jaesam and two others in Hankyoreh Literature Magazine in 1994.
President, Busan Social Information Forum (BSIF)(NPO, 2003~)
President, Busan Christian Writers Association (BCWA)(2013~)
Research Committee Member of the World Association of Korean Writers(2008~ )
President & Moderator(1st, 2nd), General Assembly of the Orthodox Presbyterian Church of Korea(2014-2017)
First President, Korea Presbyterian Theological Seminary (2012-2015)
Council Member of National Unification Advisory Council (2003-2007)
Expert Member(Unification Education) of Ministry of Unification (2004-2005)
CG & Chief Executive  of Hyundai PR Research Center (2004-2006)
CG & Chief Executive of Korea IT Cultural Content Research Institute (2003-2004)
First Vice Chairman, Korea Universities PR Association (1997)
Chief Editer, Pusan International Forum (Quarterly Academic journal, 1994-1997)
Ha Seung-moo