These export control laws apply to individuals who are (a) not U.S. citizens, permanent resident aliens, temporary resident aliens, applicants for temporary resident status, refugees, or asylees; and who are also (b) current citizens or permanent residents of a country that is subject to comprehensive trade sanctions under U.S. export control law, http://www.treasury.gov/resource-center/sanctions/Pages/default.aspx . After graduating from Horizons, process engineers may continue to work in roles aligned with their initial Horizons track, or they may choose to focus on other areas of interest, including: Reliability & Integrity Engineering – focused on asset integrity, reliability, maintainability, and operability of operating assets.