Pros
I recently was hired at Boeing in Everett as a mechanical engineer, and entire process from being interviewed, hired, and starting my first week on site was a great experience. I have 15+ years in the aerospace industry and Boeing valued my level of experience and made me feel welcomed. With a large company there are lots of opportunities for career growth and most of the employees often change jobs within the company for variety and to learn a new skill set (which Boeing supports). The benefits package at Boeing is one of the best in the Seattle area, and they also offer great support for those who want to further their education. I feel very fortunate to be working at Boeing, and as of now hope to retire there in the future.
Cons
As with all big companies, there are lots of policy and procedures which need to be followed by all employees. Also, things move slowly at Boeing so it can take a while for decisions to be made and executed.