What does one need to do, to become an FBI agent in India?
The FBI is a federal organization in the United States which does not accept non-US citizens as employees. You CAN join the Intelligence Bureau (IB) of India, which is the internal intelligence agency for India, and in many ways our FBI equivalent. If your primary interest is foreign intelligence, then RAW (Research and Analysis Wing) is also a viable option. For applications to IB as an Assistant Central Intelligence Officer you must be between 18-27 years of age (upper limit relaxed for some) and completed your undergrad from a recognized University. A recruitment exam, followed by an interview is held every year, through which the best 750 candidates are selected. From Wikipaedia:"In 1983 R&AW created its own service cadre, the Research and Analysis Service (RAS) to absorb talent from other Group A Civil Services, under the Central Staffing Scheme. Direct recruitment at Class I executive level is from Civil services officers undergoing Foundation course at Lal Bahadur Shastri National Academy of Administration. At the end of the course, R&AW conducts a campus interview. Based on a selection of psychological tests and the interview, candidates are inducted into R&AW for a lien period of one year. During this period, they have an option of rejoining their parent service (if they wish to) after which they can be permanently absorbed into the Research and Analysis Service. Delhi-based security think tank Institute for Defence Studies and Analyses noted in one of its reports that R&AW suffered from the 'tail-end syndrome' where the 'bottom of the entrance lists' of those qualifying the UPSC examinations were offered jobs. Additionally, recruitment is also by lateral deputation from the Officer corps of Armed Forces or Group A Civil Service Officers. The Civil and Defence Service Officers permanently resign their cadre and join the RAS. However, according to recent reports, officers can return to their parent cadre after serving a specific period in the agency if they wish to. Most of the secretaries have been officers from the IPS and other posts are held by IRS and IFS officers. R&AW also employs a number of linguists and other experts in various fields. The service conditions of R&AW officers are governed by the Research and Analysis Wing (Recruitment, Cadre and Service) Rules, 1975."