Pros
CSS Corp is great at finding people with every type of background and skills, from anywhere and get them assigned to a project or a job. Throughout my days at CSS Corp, I was impressed by their recruiting and HR staff: these people can find a qualified person almost anywhere in the world and are very familiar with immigration and local laws and will get a person in a specialized job super easily. As a person that was recruited from outside of America, I was really surprised of how straightforward it was for them to get me allocated to a project in North America in almost no time. These people really know their game when it comes to servicing their clients and finding them a candidate for their needs. I'n summary, I'd say, that if you're a specialist or a qualified professional and are looking for opportunities outside of your country, there's a great chance that they'd find you something in no time. They have a lot of demand and projects to put people in so if, for some reason, some project ends, you'll get assigned to a new project fairly soon. Also, unlike other consulting firms, they hire people as FTEs so people get all the benefits that a regular FTE job can get you, i.e. health care plans, PTO, retirement plans, etc.
Cons
Most of the people working at CSS Corp, even though FTEs, work as consultants for external companies creating a "no career development culture" at CSS Corp. As a consultant you're a mere resource that needs to be doing something, somewhere and that's about it; your CSS Corp manager won't know what your doing at the 3rd company and the people you report to at your client company won't care about your careers development. So basically expect to stay stuck in your role for a ver long time, doing the same thing and getting paid almost the same salary during your stay. There are of course roles that are purely intended to make CSS Corp operate but during my stay I didn't see or hear of much growth opportunities there either.