[1] The son of Louis Fink and Janet née Stone, he was born in 1957 at Crumpsall, Lancashire, where his father ran a grocery store.

[3] Fink started his career at the accountancy firm, Arthur Andersen, qualifying as FCA before briefly working for Mars Inc, then joining Citibank.

[3][6] In September 2008, Fink came out of retirement to serve as chief executive of International Standard Asset Management (ISAM) in partnership with Lord Levy.

[8] Fink served on the board of Marex until 2023 and was Chairman and the largest shareholder of Zenith Hygiene Group for 10 years, which was sold to Bain Capital in 2018.

[27] Lord Fink is Chairman of Governors at Ark Burlington Danes Academy, President of Evelina Children's Hospital and serves on the Board of Trustees of the Oxford Centre for Hebrew and Jewish Studies.