If you work for the Cognizant there are no such influencing factor that will add demerits for your selection to IIM. SO you have nothing to worry about it. Keep on studying about the CAT examination and once you crack the examination with good ranks you will get admission no matter what. Also having some work experience can give you additional credit in the admission as well as in your professional life.

To know more about CAT visit the link below:

https://bschool.careers360.com/exams/cat

I hope this answer helps. All the very best for your future endeavors!