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Mike Pacilio Exelon Generation EVP and COO

Michael   Pacilio

Executive Vice President and Chief Operating Officer, Exelon Generation

Pacilio is responsible for the safety, efficiency and reliability of Exelon Generation’s power generation fleet, which includes more than 100 generating units in 17 states. Exelon Generation’s 12,000+ employees operate the largest clean energy fleet in America, producing electricity from 10 fuel types including nuclear, natural gas, hydro, wind and solar. Pacilio also manages Exelon Generation’s growing international business portfolio, which includes operating partnerships in Japan and the UK.   


Professional History

Pacilio has more than 30 years of experience with the company. Most recently, he was Exelon Generation’s chief nuclear officer and president for the nuclear division. In that role, Pacilio was responsible for ensuring that Exelon Generation maintained high levels of performance and safety across its nuclear fleet of 23 reactors at 14 facilities in Illinois, Maryland, New Jersey, New York and Pennsylvania.

Previously, he was the chief operating officer for the nuclear division, overseeing the daily operations for Exelon Generation’s nuclear fleet. During his career with Exelon, Pacilio has held leadership roles, including that of senior vice president of Midwest operations, site vice president for both the Clinton and Braidwood stations, plant manager at Clinton Station and a variety of management roles at Dresden and Quad Cities stations.

Among other accomplishments, Pacilio led the U.S. nuclear industry’s development of two national nuclear emergency response centers as part of the industry’s response to the 2011 Fukushima events in Japan. During his four-year tenure as chief nuclear officer, Exelon Nuclear’s fleet consistently led the U.S. industry in operational efficiency and safety.



Pacilio holds a bachelor’s degree in electrical engineering from Purdue University and a senior reactor operator certification from Dresden Station. He completed the Exelon Leadership Institute Program through the Northwestern University Kellogg School of Management and the Advanced Management Program at Harvard University.​



Mike and his wife, Cheryl, live in Geneva, Ill.



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