After graduation, he improved his musical skills with Oleksandr and Tetiana Koshyts, Pavlo Matsenko, Robert Shaw, Roger Wagner (conducting), and M. Napadia (violin).
[1] He popularized the works of Ukrainian classical and contemporary composers; he had an active collaboration with the Winnipeg Symphony Orchestra, conductors Ruben Hurvych, Pierre Gambaud, Virko Baley and Bramwell Tovey.
[1] In the 1960s, he co-founded and was the impresario of the DK Attractions company, thanks to which Walter Klymkiw was able to invite many artistic groups and soloists from Ukraine to Canada for the first time in 1967 (among them the Veryovka Ukrainian Folk Choir, directed by Anatolii Avdiievskyi).
[1] Founder of the Winnipeg Carols Festival;[2] initiator and organizer of the Department of Church Music at the University of Manitoba.
[1] In 1999, the Oleksandr Kosyts Choir established the Walter Klymkiw Charitable Foundation at the Faculty of Music of the University of Manitoba.