Gregory J.D. Mumford

Career

1. 2025 – now
   Cipher Mining Inc. (renamed Cipher Digital Inc. 2026-02-20)src
   Chief Financial Officer
   From 2025-10-14
2. 2019 – 2025
   Keefe, Bruyette & Woods (Stifel)src
   Investment Banking; Director and a leader of the Digital Assets & Infrastructure group
   December 2019 to September 2025; M&A and capital-markets advice focused on digital infrastructure and industrials

Undated in the sources

• TD Banksrc, Various roles in commercial and corporate banking (credit)

Not located: Before December 2019 undated: the filings give no years for the Canadian bank roles or the McMaster degree. At 33 his career runs roughly a decade (per the proxy's 'over a decade'), so the ten-year window is only partly covered

Achievements

• Named CFO at 32, straight from a sell-side banking role at KBW, succeeding founding CFO Edward Farrellsrc
• At KBW advised on M&A and capital markets in digital infrastructure, the sector Cipher is moving intosrc
• Hired on a $500,000 base salary, a 75%-of-salary target bonus and a 375,000-RSU sign-on award vesting in three equal annual instalmentssrc

Education

• McMaster University, BCom Commercesrc
• CFA Institute, CFA chartersrc

Background

• Family The appointment 8-K states he has no family relationships with any director or executive officer and no Item 404(a) related-party interest; the 2026 proxy repeats the no-family-relationships statementsrc