Optional practical training is designed to provide you with an opportunity to gain actual employment experience in your major field of study for a maximum of one year. The work may be full time or part time, and may occur anywhere in the United States. Temporary employment for practical training may be authorized:
USCIS (United States of Citizenship and Immigration Service) regulations refer to the date you complete all requirements for a program of study, not the date you participate in graduation ceremonies and receive your diploma. Students enrolled in the English as a Second Language program are not eligible for practical training after completion of their English studies.
You must fill out an application in the International Programs Office. If you meet all the requirements, the International Student Advisor will recommend to USCIS that you be allowed to participate in practical training. Applications are sent to the USCIS Service Center in Lincoln, Nebraska for processing.
The application takes 3-4 months to be approved. Most students applying for post-completion OPT apply at the beginning of their final semester.
There is a fee associated with this process and is subject to change. The fee is approximately $200; so you may want to prepare for this expense.

