CHICAGO--(BUSINESS WIRE)--Exelon (Nasdaq, EXC) announced today the retirement of Doug Brown, senior vice president and chief investment officer. Upon Brown’s retirement on July 1, 2024, Jessica Hart, currently Exelon’s vice president of Investment Strategy and Public Markets, will be promoted to senior vice president and chief investment officer. Hart will lead the team responsible for managing all of Exelon’s investment activities including pension funds, defined contribution plans and other employee benef ...