Interview was easy. Asked a series of questions following a format that matches Exelon's core values. Answer all the questions accordingly. All answers should follow the STAR method. As long as you follow this format and have the relevant experience the interview shouldn't be part of the reason you didn't land a role

HR was not prepared. I was a former employee and they had instructed me to go to the wrong building. HR guy came to get me and he was explaining the campus to me. I asked if he had read my resume. We got to the interview room and I began a very in depth technical discussion with the hiring manager. We were having a good chat. HR guy interrupted and said there would be time for that later. Started asking me the behavioral interview questions such as "Tell us about a time where you disagreed with a policy or procedure and how you resolved that." I replied that, as a field employee, many of those policies and procedures were in place to protect against injury or death, and that there was no reason to disagree. There were several rounds of these questions, which I can only assume were designed for interviewers of retail management positions. We tried to get back into the technical discussion after half an hour of this nonsense, but the spark just wasn't there. I was immediately reminded of all the inter-departmental nonsense and seemingly extraneous employees this company retains. I asked (this was before covid) if WFH was an option. I was told that I was expected in the office 5 days a week. Needless to say, I declined the offer.