With reference to your letter for obtaining details of projects you were associated with us, its work value and performance of your services, we would like to congratulate for your efforts and endeavor your professional team has put to complete various projects with us and continuous administer of
process through Inspections helped us achieve high standards. We appreciate your exceptional commitment carried all time during business.
It is still vague. It is a little difficult to understand.
If you want, could you rewrite it with shorter sentences?
Then I can rewrite it better.