Company Directory
Ben Harper
- Managing Director, Head of ESG
- ESG & Corporate Development
Ben Harper is a Managing Director with Stonepeak and is Head of Environmental, Social & Governance (ESG). Before joining Stonepeak, Ben was the Head of Sustainability at Zurich Insurance where he was responsible for solutions that advanced the company’s sustainability priorities, with an emphasis on creating risk transfer products that supported its clients’ transitions to a low-carbon economy. Prior to Zurich, Ben worked in engineering consulting with a focus on environmental remediation and compliance.
Ben received a Bachelor of Science in Civil Engineering from Southern Polytechnic State University.
Michelle Healy
- Director, Legal
- Legal & Compliance
Michelle is a Director in Legal with Stonepeak. Before joining Stonepeak, Michelle was an Associate in the Mergers & Acquisitions group at Paul, Weiss, Rifkind, Wharton & Garrison LLP.
Michelle received a Juris Doctorate from Georgetown University Law Center and a Bachelor of Arts from the University of North Carolina at Chapel Hill.
James Hert
- Principal
- Investment Team
James is a Principal with Stonepeak. Prior to joining Stonepeak, James was a Vice President at Fortress Investment Group, where he was a member of the private equity business and focused on infrastructure, transportation, logistics, and energy investments. Prior to Fortress, James worked at J.P. Morgan as an Investment Banking Analyst within the Diversified Industrials group.
James received a Bachelor of Science, summa cum laude, in Finance from the W. P. Carey School of Business at Arizona State University with an Honors distinction from Barrett, The Honors College at Arizona State University.
Nicholas Hertlein
- Managing Director
- Investment Team
Nick is a Managing Director with Stonepeak. Prior to joining Stonepeak, Nick was a member of the Global Industrials group at Credit Suisse, where he focused on the business services sector.
Nick received a Bachelor of Business Administration in Accounting, Finance, and Business Economics from the University of Cincinnati.
Georg Hoefler
- Managing Director
- Investment Team
Georg is a Managing Director with Stonepeak. Prior to joining Stonepeak, Georg was Head of Renewables Transactions at Allianz Capital Partners (ACP), where he was instrumental in building ACP’s 3.1GW European renewables portfolio. Prior to his 14 years at ACP, Georg worked at Dresdner Kleinwort in client coverage and corporate credit.
Georg received a Diploma in Banking Economics from Frankfurt School of Finance and a Rating Analyst degree from Georg-Simon-Ohm University Nuremberg.
Jack Howell
- Co-President
- Investment Team
Jack is Co-President of Stonepeak, a member of the Stonepeak Executive Committee, and a member of all of the firm’s investment committees. In this role, Jack shares broad responsibilities across investing and the firm’s day-to-day business. Prior to joining Stonepeak, Jack worked for Davidson Kempner Capital Management, a hedge fund that focuses on distressed debt and merger arbitrage. Prior to Davidson Kempner, Jack worked for Denham Capital and Credit Suisse. Jack also serves on the board of King Ranch, Inc.
Jack received a Bachelor of Arts in Plan II Honors and a Bachelor of Arts in Economics (Business Economics Program), Phi Beta Kappa, from the University of Texas at Austin.
Eric Hsu
- Managing Director
- Investment Team
Eric is a Managing Director with Stonepeak. Before joining Stonepeak, Eric was a Managing Director at Blackstone in its credit business, where he invested in a wide range of debt and equity opportunities across infrastructure subsectors. Prior to Blackstone, Eric worked at Goldman Sachs in its financial sponsors investment banking group.
Eric received a Bachelor of Business Administration in Finance from the University of Michigan Ross School of Business.
Meredith Hunt
- Vice President, Corporate Communications
- Operations & Finance
Meredith is a Vice President with Stonepeak. Before joining Stonepeak, Meredith was a Senior Marketing Manager at BCG, where she managed global marketing strategies, including thought leadership, executive positioning, and external relations. Prior to BCG, Meredith supported business development at Cambridge Associates.
Meredith received a Bachelor of Arts in History and Political Science from Villanova University and a Master of Public Administration from American University.
John Jackman
- Managing Director
- Investment Team
John is a Managing Director with Stonepeak. Prior to joining Stonepeak, John was a Senior Managing Director at Macquarie Capital where he led the Asian infrastructure and renewable principal investment business. John has more than seventeen years of experience investing in power and renewables having worked in Australia, Europe, and Asia across ~8GW of projects while at Macquarie.
John received a Bachelor of Engineering and Bachelor of Commerce from the University of Queensland.
Regina Jakobson
- Principal, Senior Corporate Controller
- Operations & Finance
Regina is a Principal and Senior Corporate Controller with Stonepeak. Prior to Stonepeak, Regina held management company accounting roles with Eton Park Capital Management and DE Shaw. Prior to that, Regina was an Audit Manager at PricewaterhouseCoopers Investment Management group.
Regina received a Bachelor of Arts in Accounting from Queens College of the City University of New York and is a Certified Public Accountant in New York.
Sravya Jasti
- Principal
- Investment Team
Sravya is a Principal with Stonepeak. Prior to joining Stonepeak, Sravya was a member of the Infrastructure & Energy Group at Macquarie Capital, where she focused on the renewables and waste sectors.
Sravya received a Bachelor of Science in Business Administration from the New York University Stern School of Business.
Yuichi Jimbo
- Chairman, Japan
- Investment Team
Yuichi is Chairman, Japan with Stonepeak. Before joining Stonepeak, Yuichi served as Chairman of Investment Banking and Vice Chairman at BofA Securities Japan. Prior to Bank of America, he was Deputy President and Head of Investment Banking at Citigroup Global Markets Japan, where he also served on the Board of Directors and Management Committee. Previously, he was Deputy President and Head of Investment Banking of J.P. Morgan in Japan.
Yuichi received a Master of Science in Business Administration from the Sloan School of Management at the Massachusetts Institute of Technology and a Bachelor of Arts in Commerce from Hitotsubashi University.
Peter Jones
- Vice President
- Investment Team
Peter is a Vice President with Stonepeak. Before joining Stonepeak, Peter was an Analyst at ExodusPoint, a multi-strategy hedge fund where he covered energy and industrials. Prior to ExodusPoint, he worked at Citadel and First Reserve, where he primarily focused on energy. He began his career in the Energy investment banking group at Greenhill.
Peter received a Bachelor of Business Administration from the University of Texas at Austin.
Jason Kass
- Vice President, Finance
- Operations & Finance
Jason Kass is a Vice President with Stonepeak. Before joining Stonepeak, Jason was an Assistant Vice President at Blackstone within the Global Fund Finance group. Prior to Blackstone, he worked at KPMG within the real estate tax group.
Jason holds a Bachelor of Science in Business Administration and a Masters of Accounting from the University of North Carolina at Chapel Hill and is a Certified Public Accountant in New York.
Judson Keel
- Principal
- Investment Team
Judson is a Principal with Stonepeak. Before joining Stonepeak, Judson was a Principal at Blackstone in the Credit business, where he invested in a wide range of debt and equity opportunities across the energy, renewables and energy transition related industries in North America and Europe. Prior to Blackstone, Judson worked at Credit Suisse in their global energy investment banking group.
Judson received a Bachelor of Engineering in Mechanical Engineering from Vanderbilt University.
Peter Keffer
- Vice President, Legal
- Legal & Compliance
Peter is a Vice President in Legal with Stonepeak. Before joining Stonepeak, Peter was an Associate at Paul Hastings LLP, where he focused on fund related matters.
Peter received a Juris Doctorate from New York University School of Law and a Bachelor of Arts from New York University.
Chaya Kenigsberg
- Principal, Tax Finance
- Operations & Finance
Chaya is a Principal in Tax Finance with Stonepeak and is primarily responsible for tax reporting, planning and compliance. Before joining Stonepeak, Chaya was a Principal at KKR on the Tax team within the firm’s Finance department. Prior to KKR, Chaya worked at PricewaterhouseCoopers as a Manager in the Real Estate Tax group.
Chaya received a Bachelor of Science in Accounting from Yeshiva University and is a Certified Public Accountant.
Darren Keogh
- Senior Managing Director
- Investment Team
Darren is a Senior Managing Director with Stonepeak. Before joining Stonepeak, Darren was a Senior Managing Director and Global Head of Telecommunications, Media & Technology (TMT) with Macquarie Capital having joined Macquarie Group from Bankers Trust Australia in 1999.
During his 25-year career at Macquarie, Darren worked across various industries and geographies including being based in London for ten years. Since 2011, Darren has been located in Sydney and focused on opportunities in Asia Pacific. He was a member of Macquarie Capital’s Global Executive Committee as well as a board member for several operating subsidiaries.
Darren received a Bachelor of Commerce and Bachelor of Laws (Honors) from the Australian National University.
Jennie Kim
- Managing Director, Corporate Development
- ESG & Corporate Development
Jennie is a Managing Director in Corporate Development with Stonepeak. Before joining Stonepeak, Jennie was the Chief Operating Officer for Financial Institutions within Corporate and Investment Banking at Wells Fargo. Prior to Wells Fargo, Jennie worked as the Chief Administrative Officer of Client & Product Solutions at Apollo Global Management and as the Chief Operating Officer of Healthcare and Power & Utilities Investment Banking at Credit Suisse. Jennie also spent more than ten years in Investment Banking, most recently as an Executive Director at Morgan Stanley covering power and utilities.
Jennie received a Bachelor of Science degree in Engineering from Columbia University and a Master of Business Administration from Columbia Business School.
Mark Kleynerman
- Vice President, Compliance
- Legal & Compliance
Mark is a Vice President in Compliance with Stonepeak. Before joining Stonepeak, Mark was a Director at Cohen & Steers Capital Management. Prior to Cohen & Steers, he was an Examiner at the Financial Industry Regulatory Authority (FINRA).
Mark received a Juris Doctorate from New York Law School and a Bachelor of Business Administration from Brooklyn College.
Sam Ko
- Vice President
- Investment Team
Sam is a Vice President with Stonepeak. Before joining Stonepeak, Sam was an Associate at J.P. Morgan in the Financial Institutions Group, mainly covering life insurers, banks, and fintech clients, and also working closely with the Korea Coverage team on transactions in the petrochemicals and infrastructure space.
Sam received a Bachelor of Business Administration from Seoul National University.
Roger Koh
- Principal
- Investment Team
Roger is a Principal with Stonepeak. Before joining Stonepeak, Roger was a Vice President at Rippledot Capital where he focused on M&A transactions across Southeast Asia. Prior to Rippledot Capital, he worked at Health Management International and Macquarie Capital.
Roger received a Bachelor of Accountancy and a Bachelor of Business Management from the Singapore Management University.
Trent Kososki
- Senior Advisor
- Senior Advisors & Operating Partners
Trent is a Senior Advisor with Stonepeak. Before joining Stonepeak, Trent was a Partner at ECP where he worked for nearly fifteen years after joining in 2005 at its founding. Prior to ECP, Trent worked at CSFB in the Financial Sponsors group.
Trent received a Bachelor of Science in Electrical Engineering from Duke University.
Katherine Krey
- Principal
- Investor Relations
Katherine is a Principal in Co-Investment with Stonepeak. Before joining Stonepeak, Katherine was an analyst in the Global Natural Resources Group at Goldman Sachs, where she focused primarily on the midstream and utilities sectors.
Katherine received a Bachelor of Arts in Economics and International Relations from Claremont McKenna College.