Great question! According to the FBI website, the requirements are US, Citizenship, aged 23-36 years old, Fitness requirements, bachelor's degree, three years of work experience, and a US driver's license. While technically, any major will meet the requirement, certain majors are in higher demand such as Science, Technology, Engineering and Math (STEM), Foreign Languages, Law, Emergency Medicine, Accounting, Engineering. Additionally people with experience in the military, police and are pilots are given preference. You can view the requirements online at https://www.fbijobs.gov/career-paths/special-agents.