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Joseph Nigro

Joseph Nigro

Executive Vice President, Exelon; CEO, Constellation


A 26-year veteran of the energy industry, Nigro leads Constellation, Exelon’s competitive retail and commodities businesses. He is responsible for the marketing of electricity, natural gas and other energy-related products and services to Constellation customers, as well as ensuring the optimization of Exelon’s generation portfolio by obtaining maximum value for power produced while managing risk for the company and its shareholders. Constellation has a business presence in 48 states, Washington, D.C., and parts of Canada.

Professional History

Nigro previously served as senior vice president, portfolio strategy, Constellation. In that role, which he assumed in March 2012, Nigro’s responsibilities included leading the portfolio management, structuring, quantitative analysis, transmission analysis, fundamental forecasting, strategic business systems and commercial transactions functions. Additionally, Nigro was responsible for the development, monitoring and implementation of portfolio strategy; the detailed screening, revenue net fuel pricing and commercial evaluation process for structured transactions, large capital projects and acquisition opportunities; fundamental commodity price forecasting, analysis and strategy of the financial transmission products portfolio and the business oversight of the commercial group technology budget.

Nigro joined PECO Power Team in 1996 and held a number of roles of increasing responsibility for the trading and marketing organization throughout his tenure. Prior to joining Constellation, he was the senior vice president, portfolio management and strategy for Exelon Power Team. In addition, he led the merger integration for the Exelon Power Team wholesale trading and marketing organization with Constellation Energy. Previous roles included: 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 transactor. 

Prior to Exelon, he spent seven years with Phibro Energy, Inc., an independent oil trading and refining company, in Greenwich, Conn., and Houston.

Civic Involvement

Nigro serves on the Board of Directors of the National Aquarium, one of the world’s top environmental education organizations and an important anchor of regional tourism in Baltimore’s Inner Harbor.  Nigro is also a board member for The First Tee of Baltimore, an organization aimed at impacting the lives of young people by providing educational programs that build character, instill life-enhancing values and promote healthy choices through the game of golf. Nigro also serves on the Board of Trustees of Baltimore’s Living Classrooms Foundation, which provides hands-on, interdisciplinary education and job training programs that empower and motivate youth.


Nigro received his bachelor’s degree in economics from the University of Connecticut. He also completed the Exelon Leadership Institute Program in 2008 and the University of Chicago Executive Development Program in 2004.



Nigro and his wife, Melissa, reside in Baltimore.

Joseph Nigro [PDF 93KB]

Executive Vice President, Exelon; CEO, Constellation

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Joseph Nigro