Hello Student

With your government civil engineer licence you can appear for UPSC examination. But you cannot appear for any other stream of engineering examination with the licence of civil engineers obtained from the government. That you are interested to appear in UPSC exam in CSE  that is computer science engineering. But this is not possible anyway. To  appear for UPSC exam what stream of subjects that is civil engineering you have passed and got the licence from the government.

This will help.