Karl joined MTN in his current role in 2017. In 2024, the company achieved over $500 million in cost savings, improving EBITDA by 30% and increasing the sourcing division's external income by more than 25%. It also implemented an industry-first agile procurement model, aimed at addressing complex business requirements. Karl holds board positions at the Global Sourcing Company and the Joint Alliance for CSR, a group of 27 global telecom companies committed to sustainable supply chains.