Avantages
Pros: Great corporate culture (not like Accenture/IBM). Excellent freedom/independency to do your job. Several career opportunities abroad (specially Europe). Online training tools available. Global knowledge base available. In a nutshell: If you are an experienced professional (specially in SAP area) that knows how to work with almost no supervision and have an interest in working abroad, you should consider Atos...
Inconvénients
Cons: Lack of communication from the senior management. Average compensation/benefits. Focused on SAP/Managed Operations. Unknown/small company in the US. In a nutshell: If you're starting your career in IT, maybe you should consider other company like Accenture or IBM and add some experience in your resume...If you are in the IT market for a while, have no experience in SAP and want a better paycheck, you better go independent or move to the management field in your current company...