That’s great! Since you completed your Diploma in Civil Engineering in 2004, you can still join a part-time B.Tech Civil Engineering course through lateral entry. Many universities and colleges offer part-time or evening B.Tech programs for working professionals or diploma holders. You’ll usually get admission directly into the 2nd year of B.Tech. You’ll need to check if the college is approved by AICTE and offers part-time options. Some entrance tests may be required, but not always. This is a good way to upgrade your skills and get better career opportunities while continuing your job or other responsibilities.

For more details you can visit the link given below

https://engineering.careers360.com/colleges/list-of-part-time-be-btech-colleges-in-india