Guardian Metal Resources (GMTLF) appointed Michael Xavier Schlumpberger as an Independent Non-executive Director, effective November 11, 2025, replacing retiring director Mick Billing. Schlumpberger will serve on the Audit and Remuneration Committees. This appointment supports Guardian Metal’s strategy to revive U.S. tungsten production, a critical metal for defense, energy, technology and industrial sectors. Regulatory details regarding Schlumpberger’s directorships are disclosed in the announcement.
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Positive
Independent NED appointment effective 11 Nov 2025
Audit and Remuneration Committee memberships added
Negative
Director turnover: replacement of retiring director Mick Billing
11/11/2025 – 02:00 AM
LONDON, UK – Guardian Metal Resources plc (AIM:GMET)(OTCQX:GMTLF), a company strategically focused on tungsten exploration and development in Nevada, USA, has announced the appointment of Michael Xavier Schlumpberger as an Independent Non-executive Director, effective immediately. The move follows the company’s prior announcement on November 3, 2025, regarding board changes and the completion of due diligence processes.
Schlumpberger will contribute to Guardian Metal’s corporate governance by serving on both the Audit Committee and the Remuneration Committee. He succeeds Mick Billing, who is retiring from the Board.
The appointment comes at a pivotal time for Guardian Metal Resources. The company is actively working to revive U.S. tungsten production amid increasing geopolitical concerns surrounding the supply of this critical metal. Tungsten is essential in defense, energy transition, technology, and industrial sectors.
Regulatory Disclosures:
In accordance with AIM Rules for Companies, the following information regarding Mr. Schlumpberger, aged 62, is disclosed:
| Current directorships and/or partnerships: |
Former directorships and/or partnerships (within the last five years): |
Rapid Critical Metals Limited (Australia)
Spur Ranch Association (USA)
Schlumpberger Inc; (USA) |
Fort Cady (California) Corporation (USA)
Fort Cady Holdings Pty Ltd (Australia)
American Pacific Borates Pty Ltd (Australia) |
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Who has Guardian Metal Resources (GMTLF) appointed to its board on 11 November 2025?
The company appointed Michael Xavier Schlumpberger as an Independent Non-executive Director effective 11 November 2025.
What board roles will Michael Schlumpberger hold at Guardian Metal Resources (GMTLF)?
He will serve as an Independent Non-executive Director and join the Audit Committee and Remuneration Committee.
Which director did Guardian Metal Resources (GMTLF) replace with the 11 November 2025 appointment?
Michael Schlumpberger replaces Mick Billing, who is retiring from the board.
Where can investors find regulatory disclosures about the Guardian Metal Resources (GMTLF) board appointment?
Regulatory disclosures including age, current and recent directorships are provided in the announcement and on the company website.
When did Guardian Metal Resources first announce the board changes that led to the 11 November 2025 appointment?
The company previously announced board changes on 3 November 2025, with due diligence subsequently completed.
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