Pramaggiore joined ComEd in 1998 to work on the company's transition to competitive energy markets under the Illinois Consumer Choice Law of 1997. In her role as ComEd's lead lawyer and as head of Regulatory Policy, she led major policy work around the restructuring of the Illinois electric industry.
In 2009, Pramaggiore was appointed as ComEd's COO and became responsible for overseeing day-to-day operations on the electric grid and in customer operations. In that role, she led the company's effort to set the legislative framework for ComEd's smart grid build-out, a leading model nationally for modernizing one of the largest utility systems in the country.
Pramaggiore was promoted to her current position in February 2012. She is the first female to hold the post of president and CEO at the electric utility.