Leahy left Marathon Asset Management at the end of May, where he was chief financial officer. Before this, he helped found a hedge fund operations business at Moody's Investors Service, where he was also a member of the CDO team.

His legal career began at Milbank Tweed in New York City, where he was a member of the capital markets group. He later joined Skadden Arps, where he focused on M&A finance, bank loans and restructurings.