Board of Directors

Linden ("Linn") R. Evans, age 60, has been President and Chief Executive Officer of the Company since Jan. 1, 2019. He previously served as President and Chief Operating Officer from 2016 to 2018, and President and Chief Operating Officer – Utilities from 2004 to 2015. He began his career with Black Hills Corp. in 2001 as Corporate Counsel. Prior to joining the company, Mr. Evans was a mining engineer and an attorney specializing in environmental and corporate legal matters.

Steven R. Mills, age 67, has more than 40 years of experience in the fields of accounting, corporate finance, strategic planning, risk management, and mergers and acquisitions. He is a Board Member of Amyris, Inc., a renewable products company, where he serves as Chair of the Audit Committee and as a member of the Leadership, Development, Inclusion and Compensation Committee. Mr. Mills is also a consultant and advisor to Arianna S.A., a European-based specialized investment fund. Previously, Mr. Mills served as Chief Financial Officer of Amyris, Inc. from 2012 to 2013. Prior to joining Amyris, he had a 33-year career at Archer Daniels Midland Company, one of the world’s largest agricultural processors and food ingredient providers, where he held various senior executive roles, including Senior Executive Vice President Performance and Growth, Chief Financial Officer, Controller, and Senior Vice President Strategic Planning.

Rebecca B. Roberts, age 70, has over 35 years of experience in the energy industry, including managing pipelines in North America and global pipeline projects, and managing a portfolio of power plants in the United States, Asia, and the Middle East. From 2006 until her retirement in 2011, Ms. Roberts served as the President of Chevron Pipe Line Company, a pipeline company transporting crude oil, refined petroleum products, liquefied petroleum gas, natural gas, and chemicals within the United States. From 2003 until 2006, she was the President of Chevron Global Power Generation. She was previously a Board Member of Enbridge, Inc., from 2015 to 2018. Ms. Roberts is a Board Member of Abbvie, Inc. and MSA Safety, Inc., where she serves as the Chair of the Compensation Committee.

Mark A. Schober, age 67, has more than 35 years of experience in the utility and energy industry. From 2006 until his retirement in 2014, Mr. Schober served as the Senior Vice President and Chief Financial Officer of ALLETE, Inc., a public energy company. His extensive industry experience in the upper Midwest provides expertise in the regulated business model and the unique challenges of the geographic and regulatory environment in which we operate.

Teresa A. Taylor, age 59, has over 30 years of experience in the technology, media, and telecom sectors. She has been the Chief Executive Officer of Blue Valley Advisors, LLC, a consulting firm that she founded, since 2011. She was the Chief Operating Officer of Qwest Communications, Inc., a telecommunications carrier, from 2009 to 2011, where she led the daily operations and a senior management team responsible for 30,000 employees in field support, technical development, sales, marketing, customer support and information technology systems. She is a Board Member of T-Mobile USA, Inc. She was previously a Board Member of First Interstate BancSystem, Inc. from 2012 to 2020, Columbia Pipeline Group Inc. from 2015 to 2016, and NiSource, a public utility company from 2012 to 2015.

Robert P. Otto, age 63, has provided strategic planning and advisory services in cybersecurity and intelligence through his company, Bob Otto Consulting LLC, since 2017. With 34 years of U.S. Air Force service, he served as a general officer from 2008 to 2016, culminating as lieutenant general and the Deputy Chief of Staff for Intelligence, Surveillance and Reconnaissance. He was directly responsible for intelligence policy, planning, implementation, oversight, and leadership of a 27,000-person workforce.

Kathleen S. McAllister, age 58, has over 30 years of experience in diverse leadership roles with global, capital-intensive companies in the energy value chain. She served as Director, President and CEO of Transocean Partners LLC, an international provider of offshore contract drilling services from 2014 to 2016, and as CFO in 2016. She held the roles of Vice President and Treasurer of Transocean Ltd. from 2011 to 2014. Prior to 2011, she served in roles with increasing responsibility in finance, information technology, tax and treasury. Ms. McAllister is a National Association of Corporate Directors Board Fellow and a Certified Public Accountant. She previously served on the board of Maersk Drilling from 2019 to 2021, where she chaired the Audit and Risk Committee. She is a Board Member of Silverbow Resources, Inc. and TMC The Metals Company Inc., where she chairs the Audit Committees.

Tony A. Jensen, age 60, has over 35 years of experience in the international mining and mining finance industries. From 2003 until his retirement in 2019, Mr. Jensen served in several leadership roles at Royal Gold, Inc., a public precious metals company, including Director, President and Chief Executive Officer from 2006 to 2019, and Chief Operating Officer from 2003 to 2006. Prior to 2003, he held progressively more responsible roles in engineering, finance, strategic growth, safety, environmental excellence, and operational efficiency.

Barry M. Granger, age 63, has over 35 years of experience in the chemical, materials and industrial markets. He is the Managing Partner of Vonbar Investments LLC, a consulting firm he founded in 2018. He held roles as Vice President of Government Marketing and Government Affairs at DuPont from 2010 to 2017 and Vice President and General Manager, Tyvek® from 2007 to 2010. Early in his career, he served as the Executive Assistant to the Chairman and CEO of DuPont. He has held a variety of leadership positions with increasing responsibilities in operations, product management, sales and marketing.

Scott M. Prochazka, age 57, served as Board Member, President and Chief Executive Officer of CenterPoint Energy, a public energy delivery company with electric transmission and distribution, power generation and natural gas distribution operations, from 2014 until his retirement in 2020. Prior to that he was Chief Operating Officer from 2012 to 2013, Senior Vice President of Electric Business from 2011 to 2012, and Vice President of Gas Business Unit from 2009 to 2011. He held other management positions including Vice President Customer Care and Support Services and Vice President Texas Gas Region. Before his time at CenterPoint Energy, Mr. Prochazka held roles of increasing responsibility at Dow Chemical. Mr. Prochazka was a Board Member of Enable Midstream Partners, LP from 2014 to 2020, and Chairman from 2015 to 2017. Mr. Prochazka was previously a Board Member of Peridot Acquisition Corporation, from 2020 to 2021, where he served on the Audit and Compensation Committees. He is a Board Member of Peridot Acquisition Corp. II where he serves on the Audit and Compensation Committees, and Li-Cycle Holdings Corp. (successor to Peridot Acquisition Corp.) where he chairs the Audit Committee and serves on the Nominating/Governance Committee and the Compensation Committee.