Provincial rugby He represented the at the Under–18 Academy and
Craven Week tournaments in 2009 and 2010 respectively, which led to his inclusion in the South African Under–18 High Performance Squad in 2010. He also moved to the where he played at Under–19 and Under–21 level. He made his debut for the senior team during the
2012 Vodacom Cup in a match against the . He captained the side during the
2015 Varsity Cup and named in a
Varsity Cup Dream Team at the conclusion of the tournament which played one match against the
South Africa Under-20s in
Stellenbosch.
2012 Junior World Championship Liebenberg was included in and named captain of the
South Africa Under-20 squad for the
2012 IRB Junior World Championship. The team went on to win the tournament for the first time. ==Honours==