Herne is a product of Grey College and featured for the South African Schools Academy side in 2007.
Herne played for the Eastern Province Kings between 2011 and 2012, but joined the Pumas in 2013.
[3] In 2013, Herne was included in a South Africa President's XV team that played in the 2013 IRB Tbilisi Cup[4] and won the tournament after winning all three matches.
[5] Herne was a member of the Pumas side that won the Vodacom Cup for the first time in 2015, beating Western Province 24–7 in the final.
[6] Herne made just one appearances during the season, coming on as a replacement in the final.