Pros
Work life balance, 401k matching after 9 years is excellent. Great salary, Strong commitment to safety. Friendly people. Lots of opportunities to travel or change career paths. Open resourcing allows to bid on next assignment ( also in cons). World class engineers and technology being used. Working in the cutting edge of technology upstream or downstream.
Cons
Field and plant facilities tend to be high stress. Unplanned shutdowns or events lead to long hours. Weak development program for experienced new hires. Graduate development is not the best but is improving. Difficult to make quick decisions without many managers buy in. Focus on safety can be excessive or be taken advantage of. DIY Career development programs lead to a non proactive HR.