Chief Executive Officer of USA Rare Earth, Inc., leading development of a fully integrated domestic supply chain for rare earth elements and permanent magnets essential to advanced manufacturing, defense, and clean energy. Served as President and Chief Executive Officer of Siemens USA from 2018 to 2025, overseeing a $19 billion portfolio spanning energy-efficient technologies, smart infrastructure, and healthcare, with responsibility for AI and industrial data integration initiatives.
Held senior executive roles at Booz Allen Hamilton and Lockheed Martin focused on national security and defense technology. Served on advisory boards for both Trump and Biden administrations. Joined Marathon Digital board September 1, 2024. Holds B.A. in mathematics from Wake Forest University. Age 65.
Currently serves on boards of USA Rare Earth and Federal Reserve Bank of Richmond. Prior directorships include Fluence Energy and Triumph Group. At Marathon Digital, serves as Chair of Social Responsibility Committee and member of Talent, Culture and Compensation and Technology and Strategy committees.
Biography extracted from Marathon Digital DEF 14A filed 2026-04-30 View cached copy (2026-08-31)Live source ↗
Roles
Contiguous filings for the same role are collapsed into a single tenure span. Click a row to see the underlying filings.
| Company | Role | Tenure | Filings |
|---|---|---|---|
| Marathon Digital | Director | 2024-09 → present (2y 2mo) | 4 |
Show 4 underlying filings | |||
Insider transactions
Totals for this person
| Bucket | Invested (shares) | Invested (USD) | Divested (shares) | Divested (USD) | Net direction | Txns | Invested @ last price | Divested @ last price |
|---|---|---|---|---|---|---|---|---|
| All time | 136,339 | $0 | - | $0 | Flat | 3 | $923.0K | $0 |
| 2026 | 82,759 | $0 | - | $0 | Flat | 1 | $560.3K | $0 |
| 2025 | 43,103 | $0 | - | $0 | Flat | 1 | $291.8K | $0 |
| 2024 | 10,477 | $0 | - | $0 | Flat | 1 | $70.9K | $0 |
| 2024-Q4 | 10,477 | $0 | - | $0 | Flat | 1 | $70.9K | $0 |
| 2025-Q1 | 43,103 | $0 | - | $0 | Flat | 1 | $291.8K | $0 |
| 2026-Q1 | 82,759 | $0 | - | $0 | Flat | 1 | $560.3K | $0 |
Invested = shares acquired (buys, grants, option exercises) — insider adding to the position. Divested = shares reduced (sells, dispositions, tax-withholding) — cash flowing TO the insider. Net direction shows which side wins on dollar terms in each bucket. % of holder's stake not yet computed (pending Form 3/4 holdings ingest). See methodology. The two @ last price columns restate the same share counts at the most recent share price we read (close of 2026-10-30); they are a valuation, not a cash flow, and they move every day the market does.
All transactions
| Date | Company | Kind | Shares | Amount (USD) | Value @ last price |
|---|---|---|---|---|---|
| 2026-02-13 | Marathon Digital | Grant / award / vesting | 82,759 | - | $560.3K |
| 2025-02-28 | Marathon Digital | Grant / award / vesting | 43,103 | - | $291.8K |
| 2024-12-20 | Marathon Digital | Grant / award / vesting | 10,477 | - | $70.9K |