Intel officers are required to obtain a TS clearance with eligibility for SCI-level access that you are required to maintain throughout your career. You will sign NAVPERS 1070/613 (aka, Page 13) Statement of Understanding for Security Investigation that essentially states that you will be discharged if you do not get your clearance.
Depending on where you are assigned, you may also be required to take a Counterintelligence (CI) Scope Polygraph.
The process for obtaining a TS with eligibility for SCI-level access is by way of a
Single Scope Background Investigation (SSBI) which will go back 10 years. However, there are a several "ever" questions involved. That is, "have you
ever, XXXXX." You will fill out an
SF-86 via e-QIP to collect this information.
You will have this clearance periodically reviewed every five years via an SSBI-PR. You will again fill out an SF-86 via e-QIP during this process. The SSBI-PR also overlaps your previous SSBI from a dates perspective because the SSBI-PR also asks you to go back seven years, as well as asks the same "ever" questions.