Pros
Work-life balance is well maintained since the work is not challenging as it is with a real consulting firm. 401K match is great, but you are only vested after 3 years. If you can make it here for 3+ years, kudos to you. Working independently with the client allows you to make connections with companies much better than Sogeti.
Cons
Sogeti is definitely not the place for anyone in IT, let alone anyone looking to do true consulting. "Consultants" are treated solely as resources to sell to clients and not as solution deliverers (staff augmentation). Sales, sales, sales is the only focus you will hear over and over again, starting at the very top. Bonuses are based purely on business development aka sales and profit contribution aka your billing rate. Sogeti will pad their bids with work that no one at the company can actually do just to win it (because the company is driven by profit margin). Once contracts are won, they immediately seek out people who can do the job for cheap and then do a poor job of delivering to the client, which is very transparent. Due to the company's poor strategy of just winning any and all contracts, and not truly focusing on delivering quality solutions, the type of work you will be given at any moment is very unstable and quite unsatisfying. As long as you remain billable, no one at the company cares what you are doing, even if it's reading Yahoo News articles all day. With that, there is also an extreme lack of career development and mentoring for those who want to move up in their careers and are not okay with being complacent. Senior leadership does not care about developing leaders, retaining talent, and growing people's careers. Being promoted to manager does not mean you will get to manage teams and projects. There is NO logical correlation between your title, your skills, and the type of work you do. Consultants, whether fresh-out-of-college or managers, are merely treated like monopoly pieces in a game of profit. The attrition rate is extremely high due to all the aforementioned flaws with the company. Some people have left no more than 2-6 months in after quickly realizing how detrimental being at Sogeti long-term would be to one's career and returning to their former companies. However, the attrition rate is not just from people leaving, but also Sogeti's willingness to easily terminate people if they cannot place them right away. Overall, don't waste your time and look elsewhere. Getting a job at Sogeti is easy for a reason.