Hey there
Yes you can write union Public Service Commission examination after completing civil engineering and mention below are the eligibility points for doing so:
For more: https://www.google.com/url?sa=t&source=web&rct=j&url=https://competition.careers360.com/exams/upsc-civil-services-exam/amp&ved=2ahUKEwjDr4u21szzAhXDjOYKHYrXCbgQFnoECAgQAg&usg=AOvVaw0YgHjPSGbCBqWgNlDAT28h&cf=1
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