Core Scientific's 2026 proxy statement gives the dates: "Mr. Sullivan has served on our Board of Directors since January 23, 2024. Mr. Sullivan has served as our President since May 15, 2023 and as our Chief Executive Officer since August 2, 2023." He signed the company's Form 10-K for 2025 as principal executive officer on 2 March 2026.
He came to the company from the other side of a transaction. The same proxy records that from 2017 to 2023 he was Managing Director and Head of the Digital Assets and Infrastructure Group at the financial advisory firm XMS Capital Partners, "where he oversaw over $5 billion of transactions", and that while there he represented Power and Digital Infrastructure Acquisition Corporation in its 2021 acquisition of the predecessor Core Scientific business. He received a B.A. in Financial Economics from the University of Rochester.
His first months as chief executive ran alongside the chapter 11 case. The plan of reorganisation was confirmed on 16 January 2024 and the company emerged a week later, relisting on Nasdaq on 24 January 2024.