Please never do. I will gladly proofread your engineering projects without any stress. My profession as an industrial engineer (M.Eng) and pronunciation skills that I have acquired over the years, qualifies me to professionally proofread and edit your engineering projects.
I also write and proofread websites, seminars, debates, artists, politics, blogs etc.
Proofreading is fun. I just love it. Be sure to get me proofread your projects. You will be served properly on time.