Mr. Fausto Di Trapani reports

TIERNAN STRENGTHENS MANAGEMENT TEAM, HIRES MARIO MARCHESE AS COUNTRY MANAGER, CHILE

Tiernan Gold Corp. has appointed Mario Marchese as Country Manager, Chile, effective June 1, 2026.

In this role, Mr. Marchese will be Tiernan's senior in-country leader and will be responsible for establishing and running the company's Chilean organization, leading local stakeholder and regulatory relationships, co-ordinating environmental and regulatory permitting processes, and supporting the engineering and technical workstreams required to advance the company's flagship Volcan gold project in Chile's Maricunga gold belt.

"Mario brings the Chilean project leadership Volcan needs at this stage: practical project-development experience, clear judgment on permitting and stakeholder engagement, and the ability to build the local platform around the work now under way," said Fausto Di Trapani, president and chief executive officer. "His appointment gives Tiernan senior in-country leadership as we advance Volcan through environmental baseline work, community and stakeholder engagement, permitting and engineering."

The appointment follows the recent addition of James Connolly as executive vice-president, projects, and is part of Tiernan's planned buildout of the leadership team required to advance Volcan through its next phases of work.

About Mr. Marchese

Mr. Marchese is a Chilean mining and project-development executive with more than three decades experience across mining, energy, engineering, infrastructure, project development, environmental permitting, stakeholder engagement and business development in Chile and international markets.

Most recently, Mr. Marchese served as project director of the HNH green ammonia project in southern Chile, a large-scale development project, where his responsibilities included stakeholder relationships, environmental permitting, engineering design, construction planning, capital and operating cost optimization, and social-licence work. Previously, he held senior roles with Codelco's Chuquicamata division, Fluor, Hatch, Bechtel, Ausenco and Codelco Tech.

Mr. Marchese brings experience in Chilean project delivery aligning directly with Tiernan's immediate priorities: establishing an effective Chilean operating platform, keeping the environmental, consultation and engineering workstreams moving together, and supporting disciplined project definition at Volcan.

About Tiernan Gold Corp.

Tiernan Gold is focused on the disciplined derisking of the Volcan gold project, strategically located in the Atacama region of Chile, on the Maricunga gold belt, a jurisdiction that has a long-established history of mining with a number of operating mines, new mines under construction and major projects being developed.

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