Brenig began his career at GE Healthcare, before joining PwC and then Ernst & Young as a corporate finance advisor. Most recently, he was part of the venture capital team at Merchant Ventures where he was responsible for originating, structuring and managing investments. As an investor and advisor, Brenig has been involved in £0.5bn of transactions. Brenig studied pharmacology at Cardiff University and financial strategy at Oxford University, where he achieved a distinction. He is also a qualified chartered accountant.