More than 10 million U.S. workers with college degrees, or one in six, are immigrants. While many have found jobs that make full use of their education and skills, nearly a quarter are underemployed, that is, they are either working in jobs that require no more than a high school diploma or are out of work. Tackling immigrants' skill underemployment can help reduce skills shortages, especially in critical industries like healthcare. It can also address labor needs in parts of the United States that are experiencing shortages among health care and other high skill workers. Analyzing the combined 2012/14/17 PIAAC data, the authors seek to better understand the challenges and opportunities that U.S. immigrant adults with at least a bachelor's degree face in using their education and skills to integrate economically. In particular, the researchers address the following research questions: (1) What is the relationship between economic integration outcomes of college-educated immigrant adults and their literacy and numeracy skills as well as their ability to problem solve in technology-rich environments? How does this relationship differ from U.S.-born college graduates?; and (2) How do the relationships between these skills and integration outcomes vary for immigrants depending on their age at entry, place of education, English proficiency, degree level, and degree majors?