Welcome to the SI101 Board and its Forums. I hope you enjoy participating. Had you familiarized yourself with the FAQs, the Posting Guidelines, and especially the Index before posting, you might have found the following article that addresses your concern:
How Do I Get Him/Her to Orgasm From a Hand/Blow Job?
The Index contains links to helpful informative insightful, as well as how-to articles that address the most common questions and concerns people write in about, like yours. Please read the article and you will have the solution.