They pay your health insurance for you and your dependants (partner, kids), which is a great benefit in Switzerland. It is fairly easy to pass the interviews if there are any. If you are relocating it can be a good step to start with.

DISCLAIMER: this review is based on my experience and it can differ based on the client you are outsourced to and on your direct manager. It is a billing service. They magically get contracts with huge companies to outsource people for some services. From this point all they care about is whether they can bill after you or not. If your client gives a free day before Christmas for their employees, you will still have to work on that day or take a day off because no matter what the billing has to go on. Performance based evaluations are missing, because in most cases they don't get any feedback back from the client or they don't even have a clue about what is the actual work that you are doing. Getting a raise or promotion os only possible if they can bill more after you, which makes it quite impossible. Trainings are usually done online, don't expect to go to a multi day training or conference during your job, because again the billing has to go on. The health insurance is a great benefit, but be aware that they have a pretty bad deal with their insurance provider and if you decide to leave the company you will have to pay the same package for the rest of the calendar year.

The working environment is great. The flexibility and communications with the managers.

I think Cognizant is a very good company to work in. I have very good experiences.