The basic requirement is that you must not be above 37and below 23 years. Driver's license of any state in the US is a must. You must complete four- year bachelor course of a university. Must be physically fit to complete the training and execute the duties. This includes the ability to fight and complete the fire-arms training.
You must be able to acquire expertise in any one of the following areas: Law (must also possess a Juris Doctor), any language (able to pass the FBI language test), accounting (must be a major in accounting and able to pass CPA or FBI equivalent), and diversified duties (required an advanced degree with work experience or a minimum of 3 years of work experience).
Don't waste your time if you have disqualifications such as felony conviction, currently in default of your student loan, history of illegal drug use (Marijuana use longer than three years ago may be reluctantly ignored if you didn't use it more than 15 times, are otherwise qualified and you did not use any other illegal drugs, ever in your life time. This includes steroid use. If you ever used drugs in a position of law enforcement or public trust is also a disqualification.), and you can't pass a drug test.
You have to complete an application check list containing basic and background information. Give addresses and dates of residence of all homes from birth to date, including college, military, parents' homes, frat houses and everything including the temporary housing you lived with your parents when you were a year old. Give your complete work history, including any volunteer work, any law enforcement or military experience, awards and academic achievements. Fill out the application and send it to the FBI office in your locality or to the nearest one.
Take the Phase I test. This is not a test you can study for. It is more of a personality quiz. If they like your results, you may be asked to fill out their ''real'' job application. This is long and detailed. It goes into a lot of depth about you and your immediate family. They do an extensive background investigation.
If they like you on paper, they may meet you in person. They like you, but there are better qualified people, you will be kept in waiting.
You may be invited to fill out an application for continued consideration. This includes details about family history, and more details for extensive background check.
Then be prepared for the Phase II testing which includes an interview and more written tests. If you clear this phase, you will be eligible for the final process which includes polygraph, drug test, extensive background check, conditional appointment, physical examination, security interview and commitment to be available to begin work in two weeks.
If everything goes well to this point, you will be shipped off to Quantico, VA for field agent training lasting approximately for 16 weeks.
Failure at any stage will result in rejection of your candidature.