I have a Ph.D. in Educational Science from Iran. Do I need accreditation to work in the U.S.? I have a Ph.D. in Educational Science from Iran. Do I need accreditation to work in the U.S.?
You would need to be certified if you wanted to teach in the public schools (kindergarten through twelfth grade).  But there isn't anything like this for teaching in college.  It's just a matter of convincing the department that you're the right person for the job, based on your qualifications.

Edit:  I tried to make my first sentence clearer.