Pros
For incoming new grad engineers, Exelon has a good rotation program. New grad hires get to move to a different department each month for 6 months. At the end of the rotations, your manager will ask what your top 3 preferred departments are. They will try to place you in one of these if there are openings and managers approve.
Many engineering degree grads who are not electrical engineers do not think to apply to Exelon. However, electric power concepts are not difficult to pick up and many engineering tasks at the company can be learned on the job. They will hire people with industrial, manufacturing, civil, and mechanical engineering degrees for any engineering position out of school. I even know of someone being hired for an engineering position who had a mathematics degree.
Don't get too comfy in your first job with the company. After 2 years in your first position, management generally "recommends" that you move to a different department. Exelon likes its employees to get an understanding of the company's various functions.
Benefits include 401k with 5% match, employe stock purchase, BCBS PPO or BCBS High deductible HSA plan (HSA contribution of $500 per year HSA balances can be invested as well), Vision Plan, Aetna Dental plan. Bonuses for new hires are targeted for 7% of base salary depending on business unit performance, it can be higher or lower than that.
Cons
If you work in one of Exelon's utilities like PECO or ComEd then you are subject to work what is called Storm Duty. When you are on storm duty you are basically on call. If a severe storm or outage occurs during your storm duty you are called in to perform whatever function the company sees fit to assist in the restoration of service. This could be "wire watching" for downed wires, making reservations for field crews at hotels, dispatching field crews, etc. When you are called for storm duty you are expected to report in to your predetermined location within 1 hour. There are different storm teams that rotate duties throughout the year.
