Company continues to strengthen US Operations team with additional key positions added, including Tribal Liaison
RENO, Nev. – ioneer Ltd (“Ioneer” or the “Company”) (ASX: INR, Nasdaq: IONR) is pleased to announce the recent appointment of Nina Astillero as ESG Director.

Astillero has over 12 years of experience in the mining, building products, and environmental consulting fields. She has held several technical roles overseeing environmental permitting, remediation, auditing, and target setting. Previously, Astillero has worked at Holcim (US) Inc., Freeport-McMoRan, Inc., and Bureau Veritas North America.
Astillero holds a Bachelor of Science in Geology with a minor in Environmental Studies from Temple University as well as a Master of Science in Environmental Engineering from the New Jersey Institute of Technology.
Ioneer Managing Director Bernard Rowe said:
“Nina has a proven track record of developing innovative solutions to exceed environmental compliance and sustainability targets. We are thrilled to have her join Ioneer’s management team and lead the company’s environmental, social and governance program.”
Ioneer also welcomes Tashina Jim as Tribal Liaison. Part of the external affairs team, Jim will serve as the central point of contact for Ioneer on engagement with tribal nations, organizations, and enterprises in Nevada.
Jim grew up in Schurz, Nev. and is a member of the Walker River Paiute Tribe. She earned a Bachelor of Arts degree in Indigenous and American Indian Studies with an emphasis in Environmental Justice at Haskell Indian Nations University in Lawrence, Kans. After graduation she served as the environmental manager for the Walker River Paiute Tribe.
Ioneer continues to strengthen its US operations team as it advances the development of Rhyolite Ridge towards construction. In the past year the company has also added a botany specialist, a process engineer, a senior metallurgist, a financial controller and accounting assistant to its Nevada team.
About Ioneer
Ioneer Ltd is the 100% owner of the Rhyolite Ridge Lithium-Boron Project located in Nevada, USA, the only known lithium-boron deposit in North America and one of only two known such deposits in the world. The Definitive Feasibility Study (DFS) completed in 2020 confirmed Rhyolite Ridge as a world- class lithium and boron project that is expected to become a globally significant, long-life, low-cost source of lithium and boron vital to a sustainable future. In September 2021, Ioneer entered into an agreement with Sibanye-Stillwater where, following the satisfaction of conditions precedent, Sibanye- Stillwater will acquire a 50% interest in the Project, with Ioneer maintaining a 50% interest and retaining the operational management responsibility for the joint venture. In January 2023, Ioneer received a conditional commitment from the U.S. Department of Energy Loan Programs Office for up to $700 million of debt financing. Ioneer signed separate offtake agreements with Ford Motor Company and PPES (joint venture between Toyota and Panasonic) in 2022 and Korea’s EcoPro Innovation in 2021.
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