In most states, professors or lecturers require a doctoral degree from an accredited university to be eligible to teach. Therefore, a person with a PhD from a foreign university can generally teach in the US if the degree is from an accredited university. However, there are some additional requirements that may apply, such as obtaining a work visa or passing a certification exam.
Additionally, some institutions may have specific requirements for international candidates, such as proficiency in English or experience teaching in the US. Check the specific requirements for the position and institution you are applying to.