Experienced, Proven, Connected

Before founding Transition Equity Partners, LLC, Pat was a Managing Director at BlackRock Infrastructure. There he served on the Investment Committees for the Global Renewable Power and Global Energy & Power Infrastructure Funds. He also chaired BlackRock’s Energy & Power Private Equity Fund. Prior to BlackRock, Pat led Madison Dearborn Partners into the sustainable energy sector, overseeing the firm’s energy, power, and chemicals practices for a decade.

Pat currently serves on the Board of Trinity Gas Storage and Bedrock Energy, and previously served on the Boards of NextDecade, First Wind, Magellan and US Powergen.

In addition to Bachelor of Science degrees in both Biology and Mechanical Engineering from the University of Notre Dame, Pat also earned a Masters of Management from the Kellogg School of Business at Northwestern University. As an athlete, Pat played on Notre Dame’s 1988 National Championship team before spending six seasons in the NFL with Minnesota, Washington, and Chicago. Pat lives in Chicago with his wife and four children.

Prior to joining Transition Equity Partners, Michael was a Senior Managing Director at Stonepeak. There he co-led the $2.8bn Global Renewable Fund as well as sitting on the investment committee for the firm’s flagship infrastructure funds. Before joining Stonepeak, Michael headed the renewable energy investing team within Macquarie Capital based in New York.

Michael currently serves on the Board of Trinity Gas Storage, and previously served on the Boards of Madison Energy Infrastructure, Stonepeak Northeast Power, and Lansing Ethanol Services.

Michael earned a Bachelor of Business from the University of Technology in Sydney, Australia. Michael moved to the US from Australia in 2000 and lives in Rye, New York with his wife and two children.

Ryan has served as Managing Partner of Core Bridge Partners since he founded the Firm in 2015. At Core Bridge Partners, Ryan assisted with launch of 10 investment advisory firms, managing ~$2bn across a network of 700 limited partners. Before joining Core Bridge Partners, Ryan held senior management roles with Deccan Value Investors, Tower Research Group and Citigroup.

Ryan earned a Bachelor of Business Administration from the University of Notre Dame, majoring in Finance. Ryan and his wife, Tracy, have one child and live in New Jersey.

John is a Vice President at Transition Equity Partners, focused on executing buyout and growth equity investments across TEP’s core sectors. Prior to joining TEP in 2021, John was an Associate within Marathon Capital’s Investment Banking Group, facilitating M&A transactions and tax equity financings in the renewables, conventional power, carbon capture and energy services/technology sectors.

John earned his Bachelor of Business Administration in Finance, while minoring in Sustainability at the University of Notre Dame.

Elizabeth is a Vice President at Transition Equity Partners, where she is responsible for executing buyout and growth equity investments across the firm’s core sectors. Prior to joining TEP in 2025, Elizabeth was a Senior Associate on the Flagship Investment Team at Copenhagen Infrastructure Partners, where she worked on M&A transactions and asset management across a range of renewable energy technologies. Earlier in her career, she held Associate roles in both Investment Banking and Corporate Banking at Scotiabank, delivering capital solutions to clients in the renewable energy and utility sectors.

Elizabeth holds a Bachelor of Arts in Honors Business Administration from the Ivey Business School at Western University.

James is a Senior Associate at Transition Equity Partners, focused on executing buyout and growth equity investments across TEP’s core sectors. Prior to joining TEP in 2021, James played in the National Football League as an outside linebacker. While in the NFL, James Co-Founded Afia Capital, a fund targeting early-growth stage companies that benefited from the LP consortiums of professional athletes that Afia arranged.

James earned his Bachelor of Business Administration in Finance at the University of Notre Dame.

Ceci is an Associate at Transition Equity Partners, focused on executing buyout and growth equity investments across TEP’s core sectors. Prior to joining TEP in 2023, Ceci was an Investment Banking Analyst at Nomura Greentech, working on M&A transactions and equity raises across low-carbon infrastructure, and energy industrial technology.

Ceci earned her Bachelors of Commerce in Finance at the Queen’s University.

Ryan is an Associate at Transition Equity Partners, focused on executing buyout and growth equity investments across TEP’s core sectors. Prior to joining TEP in 2025, Ryan was an Associate within Marathon Capital’s Investment Banking Group, facilitating M&A transactions, capital raises and tax equity financings in the renewables, conventional power, carbon capture and energy services/technology sectors.

Ryan earned his Bachelor of Science in Finance and International Business at Indiana University.

Oana is a Senior Associate at Transition Equity Partners, where she oversees Global Capital Formation and identifies opportunities for impactful co-investments with TEP. Prior to joining the team in 2024, Oana was based between Lyon and New York, being part of the IR and Co-Investments team at ARCHIMED, a Healthcare PE firm that expanded its assets from €1 billion to €8 billion during her tenure. Earlier in her career, she was an Analyst at HeadStart Advisers, a hedge fund in London, and worked closely with The Honourable Rory Stewart on his 2020 Campaign for Mayor of London.

Oana holds a Bachelor of Science in International Political Economy and Finance from City University of London, and currently resides in New York.

Haley is in charge of managing the firms day to day operations, and assisting the executive management team. Prior to joining TEP, Haley served in similar roles while at Endeavour Capital,  and One Rock Capital.

Haley holds a Bachelor of Science in Broadcast Journalism from the University of Illinois.

Mr. Earley is currently a member of Southern Company’s Board of Directors, and previously served as Chairman, President and Chief Executive Officer of PG&E Corporation, a public utility holding company providing natural gas and electric services, from 2011 until February 2017, when he became Executive Chairman. He served as Executive Chairman until his retirement from PG&E in December 2017.  Before joining PG&E, Mr. Earley served in several executive leadership roles during his 17 years at DTE Energy, including Executive Chairman, Chairman and Chief Executive Officer. Prior to joining DTE Energy in March 1994, he served in various capacities at Long Island Lighting Company, including President and Chief Operating Officer. He was a partner at the Hunton & Williams LLP law firm as a member of the energy and environmental team. He also served as an officer in the U.S. Navy nuclear submarine program where he was qualified as a chief engineer. He previously served on the Board of Directors of Ford Motor Company, DTE Energy, PG&E Corporation, Comerica Incorporated, Masco Corporation and Long Island Lighting Company.

Mark is co-founder and Chief Operating Officer of Orchard Investment Partners, a private equity firm focused on continuation vehicles.  For over fifteen years, Mark was at the private equity firm Madison Dearborn Partners LLC as MDP’s General Counsel and then as a Senior Advisor.  At MDP, Mark served on the investment committee and was responsible for all legal and compliance matters as well as media relations and government affairs.  Prior to joining Madison Dearborn, Mark was a partner at Kirkland & Ellis, LLP and served as General Counsel of an MDP portfolio company.

Mark is a recognized leader in private equity industry having served as Chairman of the industry trade association, the American Investment Council, as a member of the Private Equity Leadership Network and as co-founder of the Private Equity General Counsel Network.  Mark was also selected to serve as the private equity industry representative on the initial Securities and Exchange Commission Investor Advisory Committee formed pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act.

Mark is the author of numerous articles on legal issues relating to mergers and acquisitions and private equity as well as co-author of a book on high yield offerings.  He has repeatedly been selected for inclusion in Illinois Super Lawyers.

Mark also serves as President of the Board of Directors of The Center for Furniture Craftsmanship in Rockport, Maine; Chairman of the Board of Trustees of Brightpoint (formerly Children’s Home & Aid) in Chicago; and member of the Council of the University of Chicago Graham School.  He has also served as a member of the Board of Directors of Nuveen Investments and US Power Generating Company and as a member of the Board of Directors of Court Theatre at the University of Chicago.

Mark earned his BS in psychology at the University of Illinois and his JD at the University of Virginia where he was an editor of the Virginia Law Review.  Mark is also a graduate of the University of Chicago Graham School where he earned at Masters of Liberal Arts.

Mr. O’Sullivan is a recognized leader in the energy industry with significant executive management experience in finance, development, operations, regulatory and ESG. He is currently a Board Member for New Jersey Resources. For nearly two decades, he served as senior vice president of development at NextEra, where he led the company’s renewable development and M&A/divestiture efforts, including the deployment of approximately $40 billion into more than 250 solar, wind, storage, nuclear and fossil fuel projects across 36 states and 4 provinces in Canada. He also served as a member of NextEra’s executive team and operating committee from 2001 until his retirement in 2020. Prior to joining NextEra, Mr. O’Sullivan served as vice president of the Midwest division of AES; division vice president of NRG North America; vice president of business development at Indeck Energy Services; development manager at Homart Development, a subsidiary of Sears; and began his career as a staff engineer at Commonwealth Edison in 1982.