Born in Yerevan. He graduated from the directing department of the Faculty of Culture of the Khachatur Abovyan Pedagogical Institute. He also studied versification, musical harmony and composition. He worked as a director in a number of theatres and at the national television. He is the author of numerous songs, instrumental works, theatre music, television films, stage performances, and television and radio productions. He has written song lyrics for various composers. Since 2003 Vahan Andreasyan has been a member of the Writers' Union of Armenia. He also graduated from the priests' training course of the Mother See of Holy Etchmiadzin. He was ordained a deacon at the Church of Surb Sargis (2004), and then a priest at the Church of Surb Grigor Lusavorich (St. Gregory the Illuminator), receiving the spiritual name Ter Tovma. As a priest he served in the Ararat Diocese (2004-2007) and in the Diocese of Southern Russia, was the spiritual pastor of the Armenian Apostolic Church in Adygea (2007-2010), and then returned to the Ararat Diocese, to Yerevan (from 2010). His works are published in the literary press. They have been translated into French, Russian and German and published in Paris and Berlin. In 2002 he received the award of the Sayat-Nova competition for the music and lyrics of the song "Barin k'haghti" ("Good Will Prevail"). In 1997 he received the award of the "Artsate banali" ("Silver Key") children's song festival for the best lyrics, and in 1992 he was named laureate of the "Asup" ("Meteor") awards as the author of the best song lyrics of the year. In 2019 he received the prize established by Sargis Gogoryan for poetry. In 2024 he received the award of the "Nerses Mets" ("Nerses the Great") awards in the poetry category.