Ann: Worley appointed as technical adviser for Araxa Project, page-2

6 May 2026

St George appoints Worley as feasibility technical adviser for the
world-class Araxá Niobium-Rare Earths Project in Brazil
St George Mining Limited (ASX: SGQ) (“St George” or “Company”) is pleased to announce that it has
appointed Worley Engenharia Ltda – the Brazilian subsidiary of Worley Limited (ASX: WOR), a leading
global professional services company headquartered in Australia – to provide technical advisory
services for the potential development of a niobium and rare earths mine at the Company’s world-class
Araxá Project in Minas Gerais, Brazil.

John Prineas, St George Mining’s Executive Chairman, commented:
“As one of the world’s largest providers of engineering and project management solutions to the
resources sector, Worley brings extensive and relevant expertise to support St George as we advance
the potential development of our world-class Araxá Project.

“Worley will work with our highly credentialled in-country team of engineers, who have decades of
combined experience in plant construction, mining and mineral production in the Araxá region, to
deliver an optimal engineering strategy for the Araxá Project.

“With a world-class resource already defined at our project, the appointment of Worley will enable
economic studies to gain momentum as we look to fast-track development and take advantage of our
favourable project logistics – notably, a location in an established mining region, access to existing
transport and energy infrastructure, availability of an experienced workforce and high-grade
mineralisation amenable to open-pit mining, which are all backed by a supportive permitting regime.
“We look forward to reporting further milestones as we progress economic studies for a potential
mining operation at Araxá.”