Pros
Honestly, none. They pay people with the same title completely different amounts that are all over the board regardless of experience. Job description means nothing at this company. Your job description will not match what you are doing whoever. You will more than likely be doing the job of multiple people and not compensated for it.
Cons
Completely understaffed. Meanwhile you will be given more and more work and responsibilities. HR does not listen to your concerns, they are cold and are in no way there for you. Management can talk to you however they wish and bully you, The job that is presented to you is grossly false. Certain people are treated completely different and immune to the workloads....and that's OK with CGI's culture. There is no work/life balance and that is the norm and what is expected from you.