Wietske was first admitted to legal practice in South Africa in 2012, where she gained litigation, trial, and alternative dispute resolution experience at a plaintiff personal injury firm. In 2014, she joined a global law firm, specialising in insurance litigation where she advised insurers on a range of disputes and handled claims in relation to personal injury, clinical negligence, aviation (in terms of national law and international conventions), product liability, general liability, subrogation, professional indemnity (including representing insureds in civil litigation and disciplinary proceedings) and coverage. She has successfully obtained numerous judgments for her clients in the higher courts of South Africa, a few of which are reported.
Wietske was admitted to the Law Society of Ontario in 2020 and joined Matthews Abogado in 2021.
Wietske obtained the degrees BA (Law) in 2007 and LLB in 2010 from the University of Stellenbosch.