 From Columbia Law School in New York, Weldon has a Juris Doctor degree, and a diploma in International Law (Hons)

Weldon worked at Skadden, Arps and McKinsey & Company, both in New York City.Weldon has served as the CEO of NZX Limited (NZX).When Weldon took over NZX, it was a mutual organization that had nearly been sold to the ASX for a peppercorn.