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Eagle Mine Announces Organizational Changes

Today we are announcing that Kristen Mariuzza, Managing Director, has accepted the position of Vice President - Environment & Social Performance for Lundin Mining effective January 1, 2020.

Kristen Mariuzza

After more than two successful years as Managing Director for Eagle Mine operations, Kristen will lead Environment and Social Performance functions for Lundin Mining. She will bring her recent experience from operations and previous roles in environment, safety, and permitting. Kristen has been with Eagle since 2010, first with Rio Tinto and subsequently Lundin Mining. Before Eagle, she worked in both consulting and as a Senior Environmental Engineer with the Michigan Department of Environmental Quality. Kristen is a licensed professional engineer and holds a Bachelor of Science in Environmental Engineering from Michigan Technological University.

“Over the past two years, it has been an absolute privilege to lead the team at Eagle Mine as managing director,” said Kristen. “I’m excited to get back into the environmental field and look forward to continuing my work with Eagle from a different perspective. It is an opportunity to take the learnings, successes, and challenges I have experienced at Eagle and apply them on a broader scale at other Lundin Mining operations.”

Darby Stacey

We would like to further announce that Darby Stacey has accepted an offer to return to Eagle Mine in the position of Managing Director effective March 1, 2020. Darby previously held the position of Mill Manager at Eagle Mine and will be returning to the Upper Peninsula with his family. Darby is currently working as a consultant, and before his time at Eagle Mine, he worked with Rio Tinto at Resolution Copper and Greens Creek Mine. Darby holds a Bachelor of Science and Master of Science in Metallurgical Engineering from Montana Tech.

“Eagle is fortunate to have Darby re-join the Eagle team, and I have no doubt he will be a driving force, along with the rest of the management team, to continue operating Eagle as a safe, sustainable, and successful operation,” said Kristen.

During the period of transition, Jeff Murray, Mine Manager at Eagle Mine, has agreed to assume the role of interim Managing Director, assuring continuity in operations at Eagle Mine.


Eagle Mine is a high-grade, nickel-copper deposit located in Michigan’s Upper Peninsula. Production commenced in September 2014 ahead of schedule and on budget. It is the first mine to be permitted under Michigan’s Part 632 Non-Ferrous Mineral Mining Law.


Lundin Mining is a diversified Canadian base metals mining company with operations in Brazil, Chile, Portugal, Sweden, and the United States of America, primarily producing copper, zinc, gold, and nickel. In addition, Lundin Mining holds an indirect 24% equity stake in the Freeport Cobalt Oy business, which includes a cobalt refinery located in Kokkola, Finland.


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