I have used up my previous F1-OPT (post completion) to do be a research assistant with my current advisor. I could do a pre-completion OPT but as per the website you linked me to:<p>&quot;If the student chooses to engage in pre-completion OPT, he or she may not work more than 20 hours per week while school is in session, but may work full-time during his or her annual vacation and other times when the school is not in session.&quot;<p>So I can&#x27;t go on doing a job on pre-completion OPT forever.