The Summer at Simons program offers a diverse range of internship opportunities at the Simons Foundation, which is dedicated to advancing research in mathematics and the basic sciences. Internships are available within both the foundation's divisions, including the Flatiron Institute for computational science and various operational departments of the Simons Foundation. Interns engage in exciting projects, collaborating with experienced scientists and supervisors who provide mentorship and guidance. The program encourages interdisciplinary collaboration within a vibrant scientific community, allowing interns to work alongside top scientists and potentially foster lasting partnerships. Beyond research and project work, participants benefit from extensive professional development through lectures, seminars, and workshops covering a wide array of STEM topics. The program also integrates social events and networking opportunities with staff and peer interns, enhancing the overall experience. All internships are conducted in person at the Simons Foundation's Manhattan offices, with potential housing support provided for participants. Opportunities at the Flatiron Institute include roles such as Research Assistants and Research Associates across centers like Computational Biology, Computational Mathematics, Computational Neuroscience, Computational Quantum Physics, and the Initiative for Computational Catalysis, as well as Software and Scientific Computing Interns. Additional Flatiron internships are offered through specific programs like Simons-NSBP Scholars and AstroCom NYC, and a Pre-Doctoral Scholar program for advanced doctoral students. Within the broader Simons Foundation, internships are available in divisions like Science, Society and Culture, _Quanta Magazine_, _The Transmitter_ (for science reporting), and the Autism in the Workplace program, which focuses on increasing employment opportunities for individuals with autism. These varied roles ensure a comprehensive and enriching summer experience for students and researchers.