Leadership

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  Andrew Lye
  Project Director, Resolution Copper

  Andrew leads the Resolution Copper team and its work to plan and permit a safe, environmentally sensitive mine. Before he came to Resolution Copper, Andrew led the La Granja copper project in Peru. He has led operational and technical teams across the globe, working in Peru, Madagascar and Australia. He has a bachelor of science in Geology and Geomorphology from Macquarie University. He has been with Rio Tinto since 2000.

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  Sterling Hundley
  Financial Operations Officer

  Sterling handles Resolution Copper’s financial planning, reporting, accounting and treasury work. He has been with Resolution Copper since 2006, has over two decades of finance experience and spent 16 years with ConocoPhillips. He led financial reporting the company’s Risk Management and Remediation team. Sterling is a certified public accountant and holds a bachelor of science in Finance from Arizona State University.

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  Chris Lilley
  Manager, Health, Safety & Environmental

  We are committed to ensuring that Resolution Copper is always a safe place to work, and Chris leads our systematic efforts in this area, which is our priority. He joined Resolution Copper in 2018, and we are benefiting from his health, safety, and mining industry experience. Most recently, he was with the Rio Tinto Kennecott mine in Utah, which earned the National Mining Association’s (NMA) 2014 Sentinels of Safety Award.

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  Victoria Peacey
  Senior Manager of Environment, Permitting & Approvals

  Vicky manages all federal, state and local agency approvals, agreements and permits. Vicky has worked in mining for approximately 20 years at reclamation sites, operations and projects across the United States. Before she came to Resolution Copper, she managed environmental affairs and permitting for a proposed mine in Michigan. She has a bachelor’s degree in Applied Science and a master of science in Civil and Environmental Engineering.

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  Caitlin Pierce
  Manager, Communities & Social Performance

  Caitlin is accountable for managing Resolution Copper's social risks and building a social license to operate. She leads a team of specialists focusing on local government, Native American Affairs, stakeholder engagement, human rights, and regional economic development. Before joining Resolution in 2020, Caitlin worked in Ethiopia and Myanmar for NGOs, US Government, and hydropower and energy projects. She holds a Master’s in Public Policy from Princeton University. 

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  Randy Seppala
  Manager, Underground Operations & Maintenance

  Randy Seppala manages the Underground Operations & Maintenance group for Resolution Copper. He has been with Resolution Copper for 13 years. He has over 40 years of underground mining experience, working in mine development, underground construction, mine operations, maintenance and engineering. He has worked in operations and projects across the United States and in Indonesia. He has a bachelor’s degree in Mining Engineering from the University of Arizona.

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  Damian Sherlock
  General Manager, Studies

  Damian is a Mechanical Engineer and mining professional with more than 20 years of experience in open cut and underground mining operations. He has held operational, corporate and project delivery roles. His expertise includes reliability engineering and maintenance management, turnaround management, procurement, business improvement, study and construction management. He has worked on several large mine development projects for Rio Tinto, including as Construction Manager for the Kestrel Mine Extension in Central Queensland, Australia and as Study Lead for the No. 9 Shaft feasibility study for Resolution Copper.

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  Tiffanny Stilgenbauer
  Manager, Business Improvement

  Tiffanny currently leads the Resolution Copper team in driving a culture of continuous improvement. Tiffanny has been at Resolution Copper since 2007, holding several positions, including Superintendent, Information Systems & Technology. She holds a Master’s Degree in Business Administration with a concentration in Accounting.

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  Michelle Stubblefield
  HR Business Partner

  Michelle is a seasoned human resources business partner with more than ten progressive human resources management expertise. Michelle’s areas of expertise include organizational structuring and development, employee engagement and retention, risk management program development and implementation, development and implementation of corporate policies, and strategic planning. Michelle has a Master of Business Administration with an emphasis in Human Resources Management and a Master of Science in Management with an emphasis in Organizational Leadership and Change, from Colorado Technical University.