SANDBROOK - Key Persons


Abdulaziz Alfalih

Job Titles:
  • Senior Advisor
Abdulaziz is Senior Advisor at Sandbrook. He is also a Partner and Board Member of Badwa Capital, based in Dubai. Abdulaziz is also an audit committee member at Riyad Bank. Prior to joining Badwa Capital, Abdulaziz worked at McKinsey & Company, TPG Capital, and Saudi Aramco. He has an MBA from Stanford Graduate School of Business, and a Bachelor of Science degree in Chemical Engineering from the Massachusetts Institute of Technology.

Alfredo Marti - Founder

Job Titles:
  • Co - Founder
  • Partner

Andreas Nauen

Job Titles:
  • Operating Partner

Carina Hahn

Job Titles:
  • Associate

Carl Williams - Founder

Job Titles:
  • Co - Founder
  • Partner

Christopher Hunt - Founder

Job Titles:
  • Co - Founder
  • Partner
Chris has had a 35-year career in renewables and power as an investor, CEO, corporate executive and entrepreneur. He has held senior executive positions at Enron, BP and Riverstone and has developed and/or built hundreds of renewable and conventional energy facilities across 40 countries. He is also a professor of practice teaching renewable energy investment at Imperial in London and on the board of the Imperial Centre for Climate Finance.

Courtney Downer

Job Titles:
  • Executive Assistant

Danielle Estatico

Job Titles:
  • Finance
  • Senior Associate
  • Member of the Finance Team
Danielle is a member of the finance team at Sandbrook. She started her career at Ernst & Young, where she worked as an auditor within the financial services team. Prior to joining Sandbrook, Danielle was an associate at Alpine Grove Partners, where she was responsible for financial reporting.

Dennis Arriola

Job Titles:
  • Operating Partner
Dennis served as Chief Executive Officer of Avangrid, Inc. from 2020 until 2022. Under Dennis' leadership, Avangrid was one of the largest players in renewable energy generation in the U.S. with over 9 gigawatts of electricity capacity, primarily through wind and solar power. He joined Avangrid from Sempra Energy, a publicly traded utility and energy infrastructure company, where he served as executive vice president and group president, and chief sustainability officer. Throughout his career, Dennis has served in a broad range of leadership positions in gas and electric utilities as well as renewables, including as chairman, president and chief executive officer of Southern California Gas Co., senior vice president and chief financial officer of both San Diego Gas & Electric and Southern California Gas Co., vice president of communications and investor relations for Sempra, and regional vice president and general manager of Sempra's South American operations.

Dianna Aprile - Chief Compliance Officer

Job Titles:
  • Chief Compliance Officer

Eline Quéméner

Job Titles:
  • Associate

Elizabeth Campbell

Job Titles:
  • Investor Relations Associate
  • Member of the Investor Relations, Marketing and Communication Team
Elizabeth is member of the investor relations, marketing and communication team at Sandbrook Capital.

Geet Bhatt - VP

Job Titles:
  • Vice President
Geet was also an investment banking analyst at Marathon Capital, where he focused on transacting in the renewable energy sector in North America.

Germán Cueva - Founder

Job Titles:
  • Co - Founder
  • Partner

Henry Foskett - VP

Job Titles:
  • Vice President

Jane Woodward

Job Titles:
  • Senior Advisor

Jean Wilson

Job Titles:
  • Operating Partner

Jennifer Hanners

Job Titles:
  • Principal

Judith Hartmann

Job Titles:
  • Operating Partner
Judith is an Operating Partner at Sandbrook. She has extensive experience in the energy sector. Judith was Deputy CEO and Group CFO (2015-2022) and interim Co-CEO (2020) at Engie where she co-developed the energy transition strategy towards renewables and energy infrastructure. She held P&L responsibility for the North American and UK/Ireland business units.

Kenneth Ryan - Founder

Job Titles:
  • Co - Founder
  • Partner

Kinga Varga

Job Titles:
  • Office Manager

Manuel Coquet

Job Titles:
  • Senior Associate

Max Fischer

Job Titles:
  • Associate

Max Leykin

Job Titles:
  • Chief Data Science Officer

Michael Liebreich

Job Titles:
  • Senior Advisor
Michael is a Senior Advisor at Sandbrook. He is Chairman and CEO of Liebreich Associates, through which he provides advisory services and speaks on clean energy and transportation, smart infrastructure, technology, climate finance and sustainable development. He is also the Founder and Senior Contributor to Bloomberg New Energy Finance.

Michelle Creighton

Job Titles:
  • Senior Associate

Mona Sutphen

Job Titles:
  • Senior Advisor
  • Independent Director for Pioneer Natural Resources
Mona is a Senior Advisor at Sandbrook. Mona has over 20 years' experience advising multinational corporate, philanthropic and institutional investors on the intersection of geopolitics, policy, and markets. Ms. Sutphen is an Independent Director for Pioneer Natural Resources (NYSE: PXD) and Pattern Energy and serves on the Boards of the International Rescue Committee and on the advisory board of the Center for Global Energy Policy at Columbia University. Ms. Sutphen is a Trustee of Mount Holyoke College and co-author of The Next American Century. She holds a BA from Mount Holyoke College and an MSc from the London School of Economics.

Nick Pibl

Job Titles:
  • Associate

Patricia Bellinger

Job Titles:
  • Operating Partner
Patricia served as the chief of staff to the 29 th president of Harvard University until June 2023. Previously Patricia was on the faculty of the Harvard Kennedy School of Government (HKS), where she taught global leadership and led the Center for Public Leadership with David Gergen. Prior to joining the HKS faculty, Patricia led the executive education business at Harvard Business School. Prior to her roles at Harvard, Bellinger served as energy conglomerate British Petroleum (BP)'s first group vice president for global diversity. One of BP's top 40 leaders, Patricia was a member of the Upstream and Downstream Excos. Under her leadership, BP won the coveted Catalyst Award for the advancement of women and progress in global diversity. She subsequently served as BP's group vice president of executive development and led the BP Leadership Academy. Patricia has served on numerous public and private company boards over the past 25 years. Patricia has been involved in renewables for over a decade, serving most recently on the board of Pattern Energy. She currently serves on the boards of Safran, Sonepar, where she chairs the RemCo, Bath and Body Works, (chair of Nom/Gov), the Academy of Motion Pictures Museum, and the Smithsonian Institution.

Roger Ferguson

Job Titles:
  • Senior Advisor
  • Member of the Smithsonian Institution 's Board
Roger is a Senior Advisor at Sandbrook. Roger is the immediate past president and CEO of TIAA. Prior to joining TIAA, Roger was head of financial services for Swiss Re and chairman of Swiss Re America Holding Corporation. He is the former vice chairman of the board of governors of the U.S. Federal Reserve System. He began his career as an attorney at the New York City office of Davis Polk & Wardwell and was an associate and partner at McKinsey & Company. Roger is a member of the Smithsonian Institution's board of regents. He is a fellow of the American Academy of Arts & Sciences. He serves on the boards of Alphabet, Inc.; Corning, Inc.; General Mills, Inc.; and International Flavors & Fragrances, Inc. Roger is also active as an advisor and board member with various private fintech companies. He serves on the boards of the Conference Board, the Institute for Advanced Study, and Memorial Sloan Kettering Cancer Center. Roger holds a BA, JD, and a PhD in economics, all from Harvard University.

Sebastian Serra

Job Titles:
  • Principal
Sebastian is a member of Sandbrook's investment team and Performance & Growth Committee.

Sheenam Chadha - CFO

Job Titles:
  • Chief Financial Officer

Tomas Luksic

Job Titles:
  • Analyst

Yunos Siddiqi - VP

Job Titles:
  • Vice President