Therefore, I am taking this opportunity to submit my application to be a part of DLR. Therefore, I am taking this opportunity to submit my application to be a part of DLR.

Therefore, I am taking this opportunity to submit my application to be a part of DLR. Therefore, I am taking this opportunity to submit my application to be a part of DLR.

With the combination of my engineering education and, research experience, in addition to myand work experience, I believe that I have the necessary prerequisites to work at the Institute of Transportation Systems. With the combination of my engineering education, research experience, and work experience, I believe that I have the necessary prerequisites to work at the Institute of Transportation Systems.

I think the in addition to came off slightly awkward, but not incorrect. Verify you have the name of the institution right, I can't check that. :)

After high school, I gotrecieved a scholarship to obtain my bachelor’s degree in Civil Engineering from Jaipur, India. After high school, I recieved a scholarship to obtain my bachelor’s degree in Civil Engineering from Jaipur, India.

Got is correct, it just comes across as slightly informal/uneducated.

After high school, I got a scholarship to obtain my bachelor’s degree in Civil Engineering fromin Jaipur, India. After high school, I got a scholarship to obtain my bachelor’s degree in Civil Engineering in Jaipur, India.

"From" would be used if you're referring to the specific university you got your degree from.

During my bachelor's, my thesis was about the strengthening of flexible road pavements, in which we used the Benkelman Beam Test to measure the rebound deflection of pavement under a standard wheel load. During my bachelors, my thesis was about the strengthening of flexible road pavements, in which we used the Benkelman Beam Test to measure the rebound deflection of pavement under a standard wheel load.

I don't have the technical knowledge to know if it should be flexible road pavements or flexible road pavement

During my bachelor's, mMy thesis was about the strengthening of flexible road pavements, in which we used the Benkelman Beam Test to measure the rebound deflection of pavement under a standard wheel load. My thesis was about the strengthening of flexible road pavements, in which we used the Benkelman Beam Test to measure the rebound deflection of pavement under a standard wheel load.