Born in 1971 in Ainjar (Lebanon), of Mousa Ler descent. He got his primary education in "Harach" and "Calouste Gulbenkian" national college of Ainjar. In 1984 he was accepted to "Zarehian" seminary of the Catholicosate of the Great House of Cilicia. In 1989 was consecrated into Senior Deacon and in 1992 was awarded the Diploma of the Seminary.
Mr. Hadjian was keen on music since childhood. He attended chorus master courses in "Parsegh Ganachian" musical institute of Lebanon's Hamazkayin Armenian Educational and Cultural Society conducted by H.Topigian.
He conducted the children's chorus of "Harach" college and won a golden medal as the first award at "Parsegh Ganachian" competition among 14 choruses of national colleges. He had solo performances at the "Shnorhali" chorus of the Catholicosate of the Great House of Cilicia, "Kousan" Chorus of Lebanon's Hamazkayin Armenian Educational and Cultural Society, "Gomidas" chorus of "Barouyr Sevag" branch of Hamazkayin in Ainjar, "Fayha" chorus of Tripoli (Lebanon) and other choruses.
He gave solo concerts in Lebanon, Syria, Bulgaria, Kuwait, Armenia, Artsakh, Cyprus and others.
He takes master classes of academic solo singing from world opera singer, Barsegh Tumanian. In 2005-2008 Mr. Hadjian attended Hovhannes Vartanian's professional classes at the Yerevan State Komitas (Gomidas) Conservatory.
Mr. Hadjian is a member and soloist academic at "Sharakan" vocal ensemble of ancient Armenian music, conducted by Daniel Yerazhisht.
By financial support of the Naregatsi Art Institute in 2008 he recorded his first CD, titled "Firstling Inspired by Gomidas", which includes 19 songs by Komitas with Levon Javadian's piano accompany.
In 2009, by the financial support of the "Punik" all Armenian Fund for the development of human resources' President Gabriel Chemberjian, Mr. Hadjian recorded the Sacred songs' CD "Bless You" with the partnership of "Sharakan" ensemble, director and conductor Daniel Yerazhisht.