American Tungsten & Antimony (ASX:AT4) appoints exploration leadership and engages SRK to support U.S. critical minerals portfolio
April 9, 2026American Tungsten & Antimony has announced a series of appointments to support the advancement of its U.S.-based critical minerals portfolio, covering antimony and tungsten projects in Utah and Nevada.
The company stated that these appointments strengthen its technical leadership, corporate governance and compliance capability as it progresses exploration and development activities across its U.S. assets.
Highlights
- David Groombridge appointed Exploration Manager USA, with more than 20 years experience in mineral exploration, resource development and project evaluation
- Previous roles include Exploration Manager at Medallion Metals, Chief Executive Officer of Riedel Resources and Senior Geologist at Silver Lake Resources
- SRK Consulting engaged to provide independent Competent Person services in accordance with the JORC Code 2012 and ASX Listing Rules
- Appointments support the company’s U.S.-based antimony and tungsten hub and spoke strategy aligned with U.S. Government priorities for domestic critical minerals supply chain security
The company confirmed the appointment of David Groombridge as Exploration Manager USA, with responsibility for planning and executing exploration programmes across its U.S. portfolio, including activities at the Antimony Canyon Project in Utah and its tungsten projects located in Utah and Nevada.
Mr Groombridge is a geoscientist with more than 20 years experience across mineral exploration, resource development and project evaluation.
His prior roles include Exploration Manager at Medallion Metals, Chief Executive Officer of Riedel Resources and Senior Geologist at Silver Lake Resources, now a subsidiary of Red 5.
The company stated that he has experience working across tungsten and polymetallic systems, including the evaluation of structurally controlled and intrusion related mineralisation styles.
In addition, the company has engaged SRK Consulting (Australasia) Pty Ltd to provide independent Competent Person services in accordance with the JORC Code 2012 Edition and ASX Listing Rules.
Under this engagement, Mr Cael Gniel, Senior Consultant, will act as Competent Person in the first instance, with Mr Danny Kentwell, Principal Consultant, providing peer review and back up Competent Person responsibility.
Both are defined as Competent Persons under the JORC Code 2012 Edition.
SRK is described as an independent international consultancy formed in 1974, employing approximately 1,800 staff across more than 40 offices in 20 countries, owned by its staff, and not holding equity in any project, with consultants providing objective technical advice.
In Australia, SRK employs more than 130 people across offices in Perth, Brisbane, Melbourne, Sydney and Newcastle.
Managing Director Andre Booyzen said the appointments support the company’s advancement of its U.S. portfolio:
“These appointments strengthen our technical and corporate capability as we advance our U.S. critical minerals portfolio. David brings strong exploration leadership and experience across both antimony and tungsten systems, which will be important as we progress exploration and drilling across our portfolio. In particular, his experience in targeting and advancing mineralised systems will support the systematic development of our tungsten assets as part of our broader U.S. supply chain strategy. The engagement of SRK Consulting, ensures the Company is well positioned to deliver fully JORC-compliant technical reporting as we progress our U.S. portfolio.”
The company outlined near term activities following these appointments, including advancement of exploration programmes across its U.S. projects, including drilling at Antimony Canyon, Tennessee Mountain and Fraction Lode.
Additional work includes continued development of its antimony and tungsten hub and spoke strategy, target generation and prioritisation across its tungsten portfolio, including Nightingale, Sage Hen and Dutch Mountain, and strengthening of its U.S. operational and corporate capability.
American Tungsten & Antimony is focused on the exploration and development of antimony and tungsten projects in the United States.
Its portfolio includes the Antimony Canyon Project in Utah and tungsten projects across Utah and Nevada, including Tennessee Mountain, Fraction Lode, Nightingale, Sage Hen and Dutch Mountain.
In this context, the company stated that it is pursuing a U.S.-based hub and spoke processing and refining strategy aligned with U.S. Government priorities for the security of domestic critical minerals supply chains.
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