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Pattern Energy

Hunter Armistead

Chief Executive Officer

Mr. Armistead serves as the Chief Executive Officer of Pattern Energy. He co-founded Pattern Energy with Mike Garland in 2009. Mr. Armistead oversees all aspects of Pattern, with a special focus on strategy, growth, capital formation, and company culture.

Previously, Mr. Armistead served as Pattern’s Chief Development Officer where he had the responsibility for all development and origination activities and had broad responsibility for running the Business Development day-to-day business. He led all global business development, including construction, engineering, and major equipment procurement.

Prior to joining Pattern Energy, Mr. Armistead spent 10 years overseeing Babcock & Brown’s North American renewable energy business, including development, construction, and operations. In previous roles, he led financing efforts for Edison Mission Energy and developed multiple facilities for Conoco. Mr. Armistead has a Bachelor of Science in electrical engineering from Rice University. He is based out of the Houston office.

Kristina Lund

President

Kristina Lund joined Pattern Energy Group as President in September 2023. Ms. Lund came to Pattern after 17 years with the AES Corporation. Her most recent position was President and CEO of AES Indiana and AES Ohio, two utilities providing electric service to 1 million customers.

Ms. Lund also served as Chief Product Officer, Carbon Free Energy, where she led the development of innovative products under a strategic alliance with Google. As a Regional Chief Financial Officer, Ms. Lund drove financial performance and strategic execution across AES businesses in 13 countries in Europe, Asia, Central America and the Caribbean and the U.S.

Ms. Lund holds a B.A. in Economics from Wellesley College and an M.B.A. from Harvard Business School. She and her husband have two sons, and she is an avid powerlifter. She is based out of the Houston office.

Cary Kottler

Chief Development Officer

Mr. Kottler serves as the Chief Development Officer of Pattern Energy. In this role, he oversees Pattern’s business development activities, encompassing the wind, solar, transmission, storage and green fuels sectors. These efforts include the creation and evaluation of new growth opportunities as well as advancing Pattern’s development pipeline through all phases of development, commercialization and into construction. 

Prior to joining Pattern, Mr. Kottler served as executive vice president of Clean Line Energy. He held a number of roles at Clean Line across the development, commercial and legal sectors, with responsibilities encompassing project development, state and federal permitting processes, FERC matters, corporate compliance, financing arrangements and commercial agreements.

Previously, Mr. Kottler was a corporate attorney for Vinson & Elkins, focusing on mergers and acquisitions, project development and private equity investments in the energy and power sector, both domestically and internationally.

Christian Hackett

Chief Investment Officer

Christian serves as Chief Investment Officer of Pattern Energy. Prior to his appointment, Christian was Vice President, Finance - Head of Corporate Development at Pattern and was responsible for co-leading Pattern’s Finance Execution team of M&A and project finance professionals. He has been with Pattern Energy since its founding in 2009. Prior to joining Pattern Energy, Christian worked for Babcock & Brown’s North American energy business, where he focused on the origination and execution of investments in the renewable energy and transmission sectors. Before that, he worked for Enron as a Director, serving around the world in numerous corporate development and origination roles. Christian holds an MBA in finance from the Kellogg School of Management at Northwestern University and a Bachelor's degree in Laws and Commerce from the University of Queensland.

Andre Walker

SVP, Power Operations

Andre Walker serves as Senior Vice President of Power Operations for Pattern Energy. In this role, he is responsible for the safe and reliable operations of Pattern’s global fleet of renewable energy facilities and oversees the full range of operational disciplines, including health & safety teams, field operations, engineering, asset management, energy management, regulatory compliance, supply chain, and environmental.

Prior to joining Pattern, Andre also held a variety of leadership roles over 16 years with Calpine Corporation including Vice President of Asset Management, Vice President of Supply Chain, and Vice President of Investor Relations in addition to several other operational and commercial roles. 

 Andre has over 25 years of experience in the power and energy industries including his experiences at Air Liquide America Corporation and Praxair Inc.  Andre earned his Bachelor of Science degree in Chemical Engineering from the University of Texas at Austin. He is based in Houston, Texas.

Sarah Webster

SVP, External Affairs & Market Development

Sarah Webster is Senior Vice President of External Affairs & Market Development for Pattern Energy. She oversees Pattern’s Government Relations, Corporate Communications, Stakeholder Management and Sustainability efforts.

Sarah has been with Pattern Energy since 2013 and enjoys building relationships with company stakeholders and serving with her team as the "diplomatic core" for the company. She has worked in the energy sector for over 20 years at companies such as InterGen, Shell and Wind Capital Group and has also worked as a music critic for the Houston Press.

Justin Sabrsula

SVP, Fundamentals and New Markets

Justin Sabrsula is Senior Vice President of Fundamentals and New Markets for Pattern Energy. He provides independent analysis and advice on the key fundamental drivers impacting Pattern Energy’s markets and identifies growth opportunities. He is also responsible for corporate strategy planning.

Prior to joining Pattern Energy, Justin served as Head of Strategy for GE Renewable Energy’s Onshore Wind division where he led global business and product strategy for equipment and services. He has also held a variety of strategy, product management and marketing leadership roles across GE’s wind, energy storage and solar divisions. He values creating opportunities and driving strategy using rigorous research and analysis, to help elevate company performance.

Justin holds a bachelor’s degree in Public Policy from Duke University and two master’s degrees, in Urban Planning and Business Administration, from The University of North Carolina at Chapel Hill.

Derek Price

SVP, Engineering, Procurement, and Construction

Derek Price is the Senior Vice President of Engineering and Construction for North America. He joined Pattern in 2013, where he has overseen engineering, preconstruction, and construction. Over the course of his career, he has worked on more than 30 renewable energy facilities with a combined output of about four gigawatts.

In his current role, Derek is overseeing preconstruction planning for over five gigawatts of new wind and solar renewable energy projects and around 1,050 miles of new high-voltage transmission line that is planned to commence construction for Pattern over the next 2-3 years, including the flagship SunZia and Southern Spirit Transmission Projects.

Derek holds a BS in construction management and business administration from Minnesota State University, Mankato.

Marta Ontiveros

SVP, Human Resources

Marta Ontiveros joined Pattern Energy Group as the Senior Vice President of Human Resources (“HR”) in January 2024. She has over 20 years of experience leading HR for global energy and industrial companies.

Ms. Ontiveros came to Pattern from Avangrid where she led Avangrid’s Workforce Development function to provide opportunities for current and future generations to access work and economic opportunities in the clean energy industry. Before that, Marta was the Vice President of HR for Avangrid Renewables where she focused on culture, talent acquisition, organizational design, and employee engagement. At Avangrid Renewables, Marta designed and implemented the organizational structure for their new Offshore Wind business line. She developed and executed the talent acquisition strategy resulting in over 200 new hires. Before joining Avangrid Renewables, she led HR functions for BP, Schlumberger, and Permasteelisa.

Marta grew up in Mexico, and she loves the outdoors and traveling. She and her husband have a son in college. She is based in the Houston office.

Alvaro Corena

SVP, Enterprise Technology

Alvaro Corena is Senior Vice President of Enterprise Technology for Pattern Energy. He is responsible for developing, planning, and implementing the digital information strategy that enables process automation and upmost system security. He oversees the delivery and support of: business and workplace application, data architecture & analytics, IT/OT infrastructure management and Cybersecurity. He is also responsible for leading the company’s process and digital transformation initiative.

Prior to joining Pattern Energy, Alvaro served as CIO of the GE Renewable - Onshore Wind segment where he was responsible for executing an all-encompassing digital strategy to support an aggressive business transformation to significantly improve profitability. Alvaro has over 25 years of experience in digital technology and leadership roles including 13 years with GE where he held a variety of positions as regional CIO and as Enterprise Application Leader where he led major digital transformations and ERP simplification initiatives; and 15 years with Oracle Corporation in consulting and IT M&A integration roles. Alvaro holds a Bachelor of Science degree in Computer Engineering.

Frank Davis

AVP, Green Fuels and Canada Country Head