Province lock on Warriors trial
The 25-year-old, who came through the Western Province youth system and went on to make 25 appearances for the Cape Town-based side, joins up with the team immediately to provide extra competition in the second row.
Alongside a host of future Springboks – including Eben Etzebeth, Siya Kolisi and Frans Malherbe – he was part of the Western Province team that won the Under-19 interprov8incial title in 2010.
After being involved with both Western Province Under-21 and the South Africa Under-20 touring squad to Argentina in 2011, Van der Sluys was part of the Western Province Vodacom Cup team which beat the Griquas to win the competition in 2012.
He was subsequently named captain of their Under-21 side, before earning selection for the seniors and also featured against Pumas in the 2015 Vodacom Cup Final.
"Wilhelm is a talented lock and we're looking forward to seeing what he has to offer," Warriors coach Carl Hogg said.