In 1986 began work in the choir of the Lviv National Opera.  In the same year singer was enrolled in the preparatory department of Mykola Lysenko Lviv National Music Academy, which graduated in 1995 (the class of solo singing by Prof. R. Vitoshynsky, the class of chamber singing by Prof. M. Logoida).  In the late 80's - in the early 90's Oleh Lykhach was a participant of the “Lviv Retro” and the theatre-studio "Ne zhurys". As a soloist with choirs "Mriya", "Gloria", "Trembita", Lviv Chamber Choir has participated in many international choral competitions and festivals.
Since 1990 Oleh Lykhach has been working at the Lviv secondary specialized music boarding school named after S. Krushelnytska.  Since 1996 - a soloist of the Lviv National Opera. Since 2002 - cooperates with the Odessa Opera and Ballet Theater, in 2005-2006 - with the Wroclaw Opera, where singer took part in the production and recording of the DVD of the opera "Halka" by S. Moniuszko (Director: Ewa Michnik, directed by Laco Adamik). In 2003 Oleh Lykhach received the honorary title "Honored Artist of Ukraine" and in 2014 - "People's Artist of Ukraine". Has toured many countries of Europe, South and North America and the Middle East.