بسم الله الرحمن الرحيم
The job of information security does not involve helping in interest. Hence it is allowable to work directly or indirectly in the department of information security in itself. However it is better if you look for another job.
Allah knows Best!
Darul Uloom Deoband
This answer was collected from the official ifta website of Darul Uloom Deoband in India.