Ventajas
The team for whom I worked was great. One of the best.
Desventajas
Other teams not so much. Herding cats and you end up taking over on an IMC call for something not even in your sphere.
I feel they blacklist employees they RIF. I had a great Director try to get me in with other BUs and nothing. He tried again and again. Others who got RIF'd told me the same. Not good. Also, seems people look over their shoulders looking for the Grim Reaper. Not a good way to be. And the higher ups that are in charge of client retention seem to not be the ones on the firing line, only the consultants that did great work for the clients who decide to leave.
HR who is supposed to help get another job within the company are worthless. They want you to do all the work. Also, CGI is so big teams only know what they know. Learning other teams' stuff seems to be frowned upon. How can you move around? This login makes you stuck.