Joseph Nigro

CEO, Constellation; Executive Vice President, Exelon

Joseph Nigro, CEO, Constellation; Executive Vice President, Exelon

A 28-year veteran of the energy industry, Nigro leads Constellation, Exelon’s competitive retail and wholesale 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 for Constellation. In that role, he led 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; revenue net fuel pricing and commercial evaluation processes 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 the PECO Power Team in 1996 and held 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 the 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 joining Exelon, Nigro 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, and 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 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.


Nigro and his wife, Melissa, reside in Baltimore.