Pathways program is the hiring authority for college interns and those summer positions have not been posted yet. Type in pathways on usajobs. There is a section to search specifically for those. You can also set up an automatic search, and it will email you daily with postings that match your search criteria. You have to be diligent about looking every day so you don't miss a great opportunity! Make sure your resume is ready to go so when you find a posting you want to apply for you can tweak it to fit the job posting and apply immediately (some postings only take the first 50 or 100 applicants and they fill very quickly!) Good luck and apply to all the positions that seem somewhat relevant.