Services for Immigrants and Internationals. Under certain conditions, U.S. immigration law may allow a U.S. employer to file a Form I-129, Petition for a Nonimmigrant Worker, with.Thank you for your interest in applying at Allegheny County. The following information will assist you through the application process. Here is everything you need to know about applying to Allegheny College as an international student, including aid and visa information. There are over 30 different career paths from which to choose. Below are vacancies open to the public (ALL US Citizens). International workers are poised to fill roles amid a worker shortage that has yet to recover from the pandemic.