Gideon completed his B. Acc Degree at the University of Stellenbosch in 2008, as well as his Honours degree at the same university in the following year. Starting his traineeship in 2010, he joined Moore Stellenbosch and obtained his CA(SA) qualification at the end of 2012. Gideon was appointed Audit Manager in 2013, and he served in this position until 2015. On 1 April 2016, Gideon Viljoen was appointed as a Director of the firm.