Sergio Castro serves as Vice President and Treasurer for Talen Energy. In this role, he leads the company’s treasury, capital markets, and investor relations functions.

Mr. Castro has significant experience in financial leadership roles within the energy sector. Prior to joining Talen, he served as Chief Financial Officer for Otto Energy where he oversaw all areas of the Finance organization. During his tenure with Contango Oil & Gas Company, Mr. Castro held positions of increasing importance, including Assistant Treasurer, Vice President & Treasurer, and Chief Financial Officer, and played key roles in several mergers and acquisitions, capital raises, and asset divestiture transactions.

A summa cum laude graduate of the University of Houston, Mr. Castro holds a bachelor’s degree in Accounting and is a Certified Public Accountant and Certified Fraud Examiner. He also proudly served in the United States Navy prior to pursuing his undergraduate studies.

Andrew “Andy” Wright was appointed as Talen Energy’s first Chief Administrative Officer in June 2023 after having served as the Company’s General Counsel and Corporate Secretary since June 2018. In this capacity, Mr. Wright oversees the Company’s Human Resources, Information Technology, Facilities, and Corporate Security functions.

Prior to joining Talen Energy, Mr. Wright spent 14 years as in-house counsel for Energy Future Holdings (EFH) Corp., most recently as Executive Vice President, General Counsel and Corporate Secretary.

Mr. Wright has a wealth of experience in the power generation space with an intimate knowledge of the financial, operational, and regulatory challenges facing the industry. He has led numerous fleet and balance sheet restructuring efforts, complex acquisitions and divestures, high-stakes litigation, and regulatory reviews. His experience includes being involved in the largest leveraged buyout in U.S. history and some of the largest financial restructurings in the industry. He also has worked closely with the board of directors at Talen Energy and EFH.

After receiving his Juris Doctorate from the University of Notre Dame, Mr. Wright went into private practice with Vinson & Elkins in both Dallas, Texas and London, England with a focus on corporate securities, mergers and acquisitions, and corporate governance.

Prior to pursuing his law career, he received a degree in Accounting from Southern Methodist University, obtained his CPA and practiced as an accountant with KPMG in Chicago, Illinois.

Cole Muller currently serves as Executive Vice President, Strategic Ventures for Talen Energy.  In this role he leads the company’s strategic initiatives, focusing on corporate strategy and strategic partnerships to unlock high impact opportunities that maximize the value of Talen’s asset portfolio.  This includes leading Talen’s Cumulus Data Center, Digital Coin, Renewables and Battery Storage businesses.

Mr. Muller has held multiple leadership roles during his tenure with Talen.  He served as Senior Vice President for its Cumulus Growth business, responsible for strategic growth across Talen’s generation asset footprint through decarbonization, repowering and development efforts.  Prior to that, he led the company’s PJM Fossil business unit, where he was responsible for over eight gigawatts of generation assets in Pennsylvania, Maryland, and New Jersey.  Before joining Talen, he was an Associate Partner for McKinsey & Co., advising energy clients, including Talen, on strategic opportunities and operational transformations.

A graduate of the U.S. Naval Academy, Mr. Muller holds a Bachelor of Science degree in Mathematics.  He received his MBA from The Wharton School, and his JD from the University of Pennsylvania.  He previously served as a submarine officer in the U.S. Navy.

Anthony “Tony” Plagens serves as Talen’s Senior Vice President and Chief Accounting Officer. In this role, he leads the company’s accounting, tax, and external financial reporting activities. Mr. Plagens has 20 years of combined energy industry and public accounting experience and joined Talen in September 2017 as Managing Director and Corporate Controller.

Prior to joining Talen Energy, he served as North American Controller for Mercuria Energy Trading. He also served in accounting management capacities at companies including ConocoPhillips, BP, and Ernst & Young across a variety of geographies throughout the U.S., U.K., and China.

A graduate of Albion College in Albion, Michigan, Mr. Plagens holds a B.A. in Economics and Management and is a Certified Public Accountant.

Ellen Liu is Talen Energy’s Senior Director of Investor Relations. In that capacity, she establishes and manages the company’s relationships with shareholders, prospective investors, and research analysts, oversees strategic communications with the financial community, and leads key areas of the quarterly reporting process.

Prior to joining Talen, Ms. Liu was a Vice President at Jefferies in the Energy Investment Banking group. In her six years there, she advised on M&A, public and private financings, and other strategic alternatives for energy companies. She also oversaw intern recruiting and analyst staffing. Ms. Liu joined Talen in 2019 as Director of Corporate Development, managing transactions and special projects.

Ms. Liu holds a bachelor’s degree in Economics and Statistics from Rice University and an MBA from Stanford Graduate School of Business.

Katie Sussen serves as Vice President, Finance for Talen Energy.  In this role she leads the Company’s financial planning and analysis, plant finance, and supply chain functions and is responsible for its long-term planning activities.

With over 15 years of experience in the energy industry, Ms. Sussen has deep experience in the competitive power generation sector.  Prior to joining Talen, she served in senior finance roles at NRG Energy, Inc., GenOn Energy, Inc., and Dynegy, a subsidiary of Vistra Corp.

Ms. Sussen holds Bachelor of Accounting and Master of Business Administration degrees from Southern Illinois University at Carbondale and is a Registered Certified Public Accountant in the state of Illinois.

Mr. Schaefer currently serves as Chairman of the Board of Talen Energy Corporation.  He also serves as a Member of the Board of Directors for Just Energy, GenOn Energy and Mountain Creek Power, LLC. He previously served as Chairman at GenOn Energy and at Texgen Power LLC and was a member of the Board of Directors for Homer City Holdings LLC and Element Markets LLC.

Mr. Schaefer has been actively involved in the deregulated natural gas and electricity markets since 1993. He was a Partner with Riverstone Holdings, a private equity firm focused on energy investing, from 2004 to 2015. While at Riverstone, he served on two of its investment committees and was primarily responsible for conventional power and renewable energy investments. Prior to joining Riverstone, Mr. Schaefer was a Managing Director with Huron Consulting Group, where he founded and headed its Energy Practice. From 1998 to 2003, Mr. Schaefer was Managing Director and Vice President with Duke Energy North America responsible for mergers and acquisitions.

Mr. Schaefer is a Chartered Financial Analyst and received his B.S., magna cum laude, in Finance and Accounting from Northeastern University in 1987.

Mr. Abbas has nearly 30 years of energy and investment experience. He is a Founding Principal of Direct Invest Development and currently serves on the Board of Directors of the New York Independent System Operator as Chairman of the Commerce & Compensation Committee and a member of the Reliability & Markets Committee. Over the last 11 years, Mr. Abbas has served on the Board of Directors of Crown Electrokinetics as Chairman of the Compensation Committee and as a member of the Audit and Governance Committees, as an Audit Committee member at Aranjin Resources Ltd., Chairman of the Compensation Committee and as an Audit Committee member at KLR Energy Acquisition Corporation, and as an Audit Committee Member at Handeni Gold.

As a long-term outspoken proponent of environmental engagement, Mr. Abbas has successfully invested in green power, biofuels, and emissions credits. Before his service on public company boards, Mr. Abbas was a founding partner of the commodity investment business at Apollo Global Management, a Vice President at Goldman Sachs, an investment associate at Morgan Stanley, a Senior Project Engineer on oil and gas construction projects for Exxon Mobil Corporation, and a Co-Op Power Engineer at Southern Company as a field and plant engineer.

Mr. Abbas holds a Bachelor of Science Degree in Electrical Engineering from Auburn University and a Master of Business Administration from Northwestern University’s Kellogg School of Business.

A 33-year veteran of the energy industry, Mr. Nigro is an advisor to the Exelon CEO until March 31, 2023, and was most recently Exelon’s Chief Financial Officer from May 2018 to October 2022. He was also a member of the Exelon Executive Committee and served as Chair of Exelon’s Corporate Investment Committee. Previously, Mr. Nigro served as Chief Executive Officer of Constellation, an Exelon operating division, from 2013 to 2018 and as senior vice president, portfolio strategy, prior to that.

Before joining Constellation, he was the senior vice president, portfolio management and strategy, for the Exelon Power Team. In addition, Mr. Nigro led the merger integration for the Exelon Power Team wholesale trading and marketing organization with Constellation Energy. Mr. Nigro’s previous roles include: vice president, structuring and portfolio management; director, commercial transactions; manager, Northeast Region, responsible for the trading and marketing of Exelon’s assets in New England; integration lead – Power Team/Sithe New England Holdings; manager, financial trading – hedge book; and financial transaction. Mr. Nigro started with PECO Energy, now an Exelon company, in 1996 and also spent seven years prior with Phibro Energy, Inc., an independent oil trading and refining company.

Mr. Nigro received his bachelor’s degree in economics from the University of Connecticut. He has also completed the Exelon Leadership Institute Program through the Northwestern University Kellogg School of Management, the University of Chicago Executive Development Program, and the MIT Reactor Technology Course for Utility Executives.

Mr. Nigro also serves on the board of directors for the Chicago Public Library and previously served on the Advisory Board for FM Global Mutual Insurance Company – Philadelphia/Washington region.

Ms. Benson has nearly 20 years of experience in natural resources risk management, capital markets, and investing. She previously served as a member of Orion Infrastructure Capital’s Senior Advisory Board after retiring as a Managing Director and Investment Principal in 2022.

Before joining OIC, Ms. Benson spent 17 years in various roles at Goldman Sachs. Most recently, she was a Managing Director in the Financing Group on the Structured Finance and Risk Management team in the Investment Banking Division; there she was responsible for the firm’s commodity structured finance efforts within Investment Banking. Prior to that, Ms. Benson was a Managing Director on the Energy Sales and Structuring teams in the Securities Division. She began her career at Goldman Sachs in 2004 as an analyst on the Energy team.

Ms. Benson serves as co-chair of a Harvard School Committee in New York City and previously served on the Board of Directors for the Women’s Energy Network – Greater New York City Chapter, Inc. Ms. Benson received an A.B. in Earth and Planetary Sciences, magna cum laude, from Harvard University in 2004. There she focused on Structural and Economic Geology and published research on earthquakes in Southern California.

Ms. Hyde served as Senior Vice President, Chief Compliance & Ethics Officer, Chief Audit Executive, and Chief Risk Officer of Xcel Energy until her retirement in 2022. Across her 30 years with Xcel Energy, Ms. Hyde served in various roles with increasing responsibility, including roles in rates and regulatory affairs, resource planning and acquisition, and risk management. She was also responsible forecasting and production cost, expansion plan modeling, and evaluating the effectiveness of compliance programs, control frameworks, and Ms. Hyde spent approximately a decade negotiating structured power purchase arrangements, including Xcel Energy’s initial renewable energy contracts, and was responsible for renewable energy compliance.

Prior to joining Xcel Energy, Ms. Hyde was a lead nuclear engineer as a civilian employee of the United States Department of Defense where she was responsible for overhauling submarine reactors.

Ms. Hyde has a Bachelor of Science in Metallurgical Engineering from Lafayette College and a Master of Science in Mineral Economics from the Colorado School of Mines.

Brad Berryman serves as Talen Energy’s senior vice president and Chief Nuclear Officer, responsible for overseeing all aspects of the company’s Susquehanna nuclear power plant, a two-unit, approximately 2,500 megawatt station in Salem Township, Luzerne County, Pennsylvania.

Mr. Berryman joined Talen Energy in early 2017 in the role of site vice president for its Susquehanna Nuclear, LLC division. In this role, he was responsible for all plant operations and personnel. During his tenure as site vice president, Mr. Berryman was central to the Susquehanna’s performance improvement in the areas of operations, finance and safety.

With over two decades of extensive commercial nuclear experience, Mr. Berryman has held positions of increasing importance spanning various technical, operational, training and financial capacities. Prior to joining Talen, he served as general manager at Turkey Point Nuclear Generating Station. He also held leadership roles at: Wolf Creek Nuclear Operating Corporation, Palo Verde Nuclear Generating Station, and Arkansas Nuclear One.

A summa cum laude graduate of Central Baptist College, Berryman holds a B.S. in Organizational Management. In addition, he proudly served his country in the U.S. Navy as part of the submarine fast attack fleet.

In the community, Mr. Berryman serves on the board of directors of the Berwick Area United Way and actively participates in a variety of company volunteer initiatives.

Dale Lebsack serves as Chief Fossil Officer leading Talen Energy’s approximately 10-gigawatt fossil generation fleet.  He also is President of the Company’s Talen Montana division.

Mr. Lebsack joined Talen in 2015 as part of its acquisition of RJS Power from affiliates of Riverstone Holdings, LLC. Since joining the Company, he has taken on roles of increasing importance, including business unit leader for Talen’s generation assets in Montana, ERCOT, and the Northeast and Senior Vice President Fossil Operations.

Prior to joining Talen, Mr. Lebsack held various leadership roles with RJS Power and its affiliates in asset management, project development, plant operations, and environmental, health and safety. In those roles, Mr. Lebsack led the technical planning and permitting related to a $1.2 billion repowering of three power plants in Texas; managed the conversion to biomass of a coal-fired plant in North Carolina; and led the technical due diligence related to the acquisition of a gas asset portfolio in New Jersey and a coal asset portfolio in Maryland. Apart from his roles with RJS Power, Mr. Lebsack’s experience includes plant-level positions with Duke Energy North America and Entergy.

A graduate of Georgia Institute of Technology, Mr. Lebsack earned a B.S. in Mechanical Engineering.

Chris Morice was appointed Chief Commercial Officer of Talen Energy in 2023, overseeing the Company’s wholesale trading and fleet optimization activities.

With 15 years of profitable leadership, Mr. Morice began his career in New York City at Lehman Brothers before moving to Houston with Lehman’s acquisition of Eagle Energy Partners in 2009.

Mr. Morice joined Talen in 2017 as Desk Head/Lead Trader, tasked with P&L responsibilities, managing numerous products across multiple regions.  Prior to joining Talen, he worked exclusively in market-facing, risk-taking, revenue-generating roles at Koch Energy, Topaz Power, and EDF Trading.

Mr. Morice holds a bachelor’s degree from the University of Missouri, Columbia and a master’s degree from Fordham University, Bronx.

Terry Nutt serves as Talen Energy’s Chief Financial Officer. In this capacity, he oversees the Company’s finance, risk management, accounting, investor relations, M&A, and treasury functions.

With over 20 years of experience in the energy industry, Mr. Nutt’s tenure includes utility companies, power generation providers and energy trading firms. Prior to joining Talen, he served as Chief Financial Officer for retail energy provider Just Energy. Previous to that, he was Chief Financial Officer and Managing Director for EDF Trading North America, a subsidiary of Électricité de France (EDF) S.A., a multinational energy utility headquartered in France. He also has held multiple senior finance positions at Vistra Corporation (and its predecessor company Energy Future Holdings) including Senior Vice President and Controller and Senior Vice President of Risk Management.

A Certified Public Accountant in the state of Texas, Mr. Nutt holds a Bachelor of Business Administration and a Master of Science degree in Accounting from Texas A&M University, College Station.

Olivia Sigo serves as Talen Energy’s Vice President of Risk Management. She is responsible for the risk management function, including market risk, trade control activities, position reporting, P&L reporting, enterprise risk management, and credit risk management activities for the overall Company.

Ms. Sigo has over a decade of experience in the energy and power industry, with responsibilities including financial analysis, business management, and derivative sales. She began her career at Merrill Lynch, where she held various roles, including serving as an analyst for the commodities sales team. After Merrill Lynch, she spent over eight years at Deutsche Bank, where she was responsible for the overall management of the North American power and gas trading business, including facilitating growth initiatives, managing risk, and ensuring best practices and infrastructure were in place. Ms. Sigo joined Talen Energy in January 2018, where she eventually served as finance lead for over 3GW of generation.

Ms. Sigo holds a bachelor’s degree in Finance from the University of Houston-Downtown.

Mr. Horton currently serves as Chief Executive Officer of AR Horton Advisors, Chairman of the Board of Directors for Just Energy, Independent Director for Neiman Marcus’ Mariposa Holdings, Travelport, Seadrill Partners, and Arena Energy, and Independent Director and Chairman of the Board of NanoLumens.

Mr. Horton has more than 25 years of energy and technology experience and was Executive Vice President and Chief Financial Officer at Energy Future Holdings and Senior Director of Corporate and Public Policy at TXU Energy. He also has experience serving on various boards of directors and committees of companies involved in turnarounds and restructuring matters.

Mr. Horton holds a Masters of Professional Accounting and Finance from the University of Texas at Dallas/Arlington and a BBA in Economics and Management from the University of Texas at Arlington. He is a Certified Public Accountant, Chartered Financial Analyst, Certified Management Accountant, and Certified Financial Manager.

Mark (“Mac”) McFarland is the President and Chief Executive Officer of Talen Energy Corporation. He was appointed to the role in May 2023 and concurrently joined the Company’s Board. In this capacity, Mr. McFarland oversees all aspects of the Company’s long-term strategy and overall performance including leadership of its wholesale power generation business, commercial operations, and its Cumulus growth businesses.

Mr. McFarland previously served as President and Chief Executive Officer as well as Chairman of the Board of California Resources Corporation (CRC), an independent energy and carbon management company committed to energy transition. He continues to serve on the Board of CRC and Chairs Carbon TerraVault, a wholly owned subsidiary of CRC. Prior to his roles with CRC, he was Executive Chairman of GenOn Energy, an independent power producer. He also served as their President and Chief Executive Officer from April 2017 to December 2018 and continued on as a member of their Board the until September 2022. From 2013 to 2016, he served as Chief Executive Officer of Luminant Holding Company LLC, a subsidiary of Energy Future Holdings Corporation, a large independent power producer. From 2008 to 2013, he served as both Chief Commercial Officer of Luminant and Executive Vice President, Corporate Development and Strategy of Energy Future Holdings. From 1999 to 2008, Mr. McFarland served in various roles at Exelon Corporation, including as Senior Vice President, Corporate Development.

Currently, Mr. McFarland serves on the Board of Directors of the Nuclear Energy Institute, and previously served on the Boards of TerraForm Power, Bruin E&P Partners, and Chaparral Energy.

Mr. McFarland earned his Master of Business Administration Degree from the University of Delaware and a Bachelor of Science degree in Civil Engineering (Environmental Concentration) from Virginia Polytechnic Institute and State University. He received his professional engineer license in 1995.