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What security clearances do Navy rates require, and what can disqualify you?

TL;DR — Quick Answer

Many Navy ratings require a security clearance — Confidential, Secret, or Top Secret/SCI — before you can work in your specialty. Clearances are granted by the Department of Defense based on a background investigation covering your financial history, criminal record, foreign contacts, and personal conduct. Disqualifiers include recent drug use, significant debt, foreign citizenship, and certain criminal convictions.

The three levels of DoD security clearance

The Department of Defense uses a tiered clearance system. Confidential (the lowest level) is the most common and requires a basic background check. Secret clearance is required for a wide range of Navy ratings and involves a more thorough investigation of your background over the past 7–10 years. Top Secret (TS) is required for access to the most sensitive information, and TS/SCI (Sensitive Compartmented Information) adds access to classified intelligence compartments. The higher the clearance, the longer and more invasive the investigation.

Which Navy ratings require clearances?

Most ratings require at least a Secret clearance. Ratings that routinely require Top Secret or TS/SCI include the Cryptologic Technician (CT) community (CTI, CTN, CTR, CTT, CTM), Intelligence Specialist (IS), Information Systems Technician (IT) in certain billets, and Explosive Ordnance Disposal (EOD). Some ratings — like Culinary Specialist (CS) or Boatswain's Mate (BM) — may only need a Confidential or no clearance for most billets. Check the individual rating profile pages on this site for clearance requirements.

Common disqualifiers for a security clearance

The most common reasons applicants are denied or have their clearance delayed include: drug use within the past few years (marijuana use is taken seriously even in states where it's legal, though recent DoD policy has added some flexibility); delinquent debt or bankruptcy (especially unexplained or unresolved); criminal convictions (particularly violent offenses, domestic violence, or DUIs); significant foreign contacts or dual citizenship; and dishonesty on the SF-86 application itself. Lying on the SF-86 is often more disqualifying than the underlying issue you were trying to hide.

The investigation process

The clearance investigation begins after you complete the Standard Form 86 (SF-86), now submitted through the eApp (formerly eQIP) system. Investigators from the Defense Counterintelligence and Security Agency (DCSA) will contact your references, verify your employment and education history, and review financial and criminal records. For higher-level clearances, they may conduct in-person interviews with neighbors, coworkers, and family members. Processing times vary widely — from a few months for Confidential to 12+ months for TS/SCI in periods of high demand.

Can you appeal a clearance denial?

Yes. The Defense Office of Hearings and Appeals (DOHA) handles appeals from applicants whose clearances have been denied or revoked. The appeals process involves submitting a written statement and, if desired, a hearing before an Administrative Judge. Mitigation factors — time elapsed since the disqualifying conduct, evidence of rehabilitation, voluntary disclosure — are taken seriously. Many initial denials are reversed on appeal when the applicant can demonstrate that their situation has changed or was mischaracterized in the initial investigation.

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