US Government Security Clearance: Levels, SF-86, and Investigation

A US government security clearance is an official determination that you are eligible to access classified national security information, and you can only obtain one when a federal agency or cleared government contractor sponsors you for a specific job that requires that access. You cannot apply on your own, pay for one, or carry one around looking for work. The process runs on federal rules set out in Executive Order 13526 (which defines what is classified) and Executive Order 12968 (which governs who can see it), and from the moment your paperwork is submitted, expect the investigation to take anywhere from a few months to well over a year.¹²

The Three Clearance Levels

Executive Order 13526 sets three levels, each tied to how much harm unauthorized disclosure could cause.¹

Confidential covers information whose release could reasonably be expected to cause damage to national security.
Secret covers information whose release could cause serious damage.
Top Secret covers information whose release could cause exceptionally grave damage, such as compromised military operations or exposed intelligence sources.

Your sponsoring position dictates which level you need. You don’t choose it, and holding a higher clearance doesn’t automatically give you access to everything below or beside it — access still runs on the “need-to-know” principle.

How You Actually Get Sponsored

Sponsorship is the whole ballgame. A federal agency or cleared contractor must offer you a position that genuinely requires classified access, and that offer triggers the paperwork.² If your role later changes and no longer requires access, the clearance is typically deactivated.

US citizenship is a baseline requirement. Non-citizens do not qualify. A sponsoring contractor can in limited circumstances request a Limited Access Authorization, which permits access up to the Secret level only, but that is a narrow exception rather than a clearance.³

Interim Clearances

Because full investigations take months, the Defense Counterintelligence and Security Agency (DCSA) automatically considers all contractor applicants for interim eligibility when they submit their paperwork.⁴ If a quick review of your SF-86 and available records turns up nothing immediately disqualifying, you can start working while the full investigation continues. Interim eligibility can be revoked at any time if the investigation later surfaces problems, and if that happens you lose access immediately.

What the SF-86 Asks For

The Standard Form 86, officially titled “Questionnaire for National Security Positions,” is the backbone of every clearance application.⁵ You complete it electronically through the e-QIP system using access codes provided by your sponsor’s Facility Security Officer.⁶

The form demands ten years of residential history with no gaps. For any address in the last three years, you need a verifier who has actually been to the residence, and it cannot be your spouse.⁷ A neighbor, roommate, or landlord works. Employment history similarly covers ten years, with supervisor contacts and reasons for leaving each job. You’ll also disclose educational records, every trip outside the US, foreign contacts, and current financial obligations including debts, bankruptcies, and tax issues.

Start compiling this information the moment you know a clearance is coming. Tracking down old supervisors and reconstructing foreign trips takes weeks if your records are thin.

Accuracy is not optional. Investigators verify what you write, and omissions look far worse than disclosed problems. Deliberately lying on the SF-86 is a federal crime under 18 U.S.C. § 1001, carrying up to five years in prison.⁸ Adjudicators can often work with a mistake you disclosed honestly. They cannot work with a lie they caught.

The Questions People Worry Most About

Mental Health Counseling

Question 21 asks about psychological health counseling and hospitalizations within the past seven years. You can answer “no” even if you received counseling, as long as the care was solely for grief, marital or family issues, adjustment from combat service, or being a sexual assault victim.⁹ If you do report counseling, an investigator may contact your provider, but only to ask whether the condition could impair your judgment, reliability, or ability to protect classified information. If the provider says no, the inquiry stops there. Seeking help is not a red flag. Untreated conditions that could affect reliability are.

Marijuana and Drug Use

The clearance system runs entirely on federal rules, and marijuana remains a controlled substance under federal law regardless of state legalization. Even after the 2026 rescheduling of certain medical marijuana products from Schedule I to Schedule III, all marijuana use still falls under Guideline H (Drug Involvement and Substance Misuse).¹⁰ Past use can be mitigated if it was long ago, infrequent, or followed by a clear pattern of abstinence. Current use, or recent use while knowing you were subject to federal rules, will sink an application. Using marijuana while already holding a clearance is treated especially seriously.

Dual Citizenship and Foreign Contacts

Dual citizenship does not automatically disqualify you. Under the current adjudicative guidelines, you are not required to renounce foreign citizenship, and you may possess a foreign passport.¹¹ What matters is behavior. Adjudicators look at whether you have actively exercised foreign citizenship privileges, such as voting in foreign elections, performing foreign military service, or accepting benefits from a foreign government, because those actions can signal divided loyalty. Any foreign passport use must be fully disclosed. Close or continuing contact with foreign nationals, especially those connected to foreign governments, has to be reported on the SF-86 and will be examined.

The Investigation and How Long It Takes

Once your SF-86 is submitted, DCSA (or another authorized investigative body) verifies what you reported. Investigators interview your references, former employers, and neighbors. You will sit for a personal subject interview where an investigator walks through the SF-86 in detail, probing discrepancies and asking follow-up questions about finances, foreign contacts, drug use, and anything else the records check flagged.

As of early 2026, DCSA industry cases are averaging roughly 150 to 160 days for Secret clearances and around 225 to 245 days for Top Secret, measured from submission to final determination. Those are the fastest 90 percent of cases. Complicated backgrounds — extensive foreign travel, financial issues, many addresses — land in the longer tail. Most Secret applicants finish in two to five months. Top Secret investigations routinely stretch to six months or beyond.

How the Decision Gets Made

After the investigation closes, an adjudicator decides whether granting you access is consistent with national security. It’s not a pass-fail checklist. Adjudicators apply the “whole-person concept,” weighing your entire history to determine whether you’re an acceptable security risk.¹²

Factors include your age and maturity when a problematic event occurred, evidence of rehabilitation, the frequency and seriousness of the conduct, the likelihood of recurrence, and whether circumstances could make you vulnerable to coercion.¹² A DUI from eight years ago with no subsequent issues is weighed very differently than one from last year.

The framework is organized into thirteen guideline categories under Security Executive Agent Directive 4:¹⁰ Allegiance to the United States (A), Foreign Influence (B), Foreign Preference (C), Sexual Behavior (D), Personal Conduct (E), Financial Considerations (F), Alcohol Consumption (G), Drug Involvement and Substance Misuse (H), Psychological Conditions (I), Criminal Conduct (J), Handling Protected Information (K), Outside Activities (L), and Use of Information Technology Systems (M).

Each guideline lists specific concerns and corresponding mitigating conditions. Financial problems under Guideline F are among the most common reasons for denial or delay, not because debt alone is disqualifying but because unresolved financial distress can signal poor judgment or create vulnerability to bribery. Someone with $40,000 in credit card debt, a repayment plan, and consistent payments is in a fundamentally different position than someone ignoring the same debt.

Above Top Secret: SCI, SAPs, and Polygraphs

People sometimes describe certain clearances as “above Top Secret.” That’s not technically accurate. What exists above a standard Top Secret clearance are additional access designations layered on top of it.

Sensitive Compartmented Information (SCI) covers intelligence data divided into compartments. You might hold a Top Secret clearance and still be locked out of a particular compartment if you haven’t been read into it. Gaining TS/SCI access typically requires drug screening, a counterintelligence-scope polygraph, and personal interviews beyond the standard investigation. Agencies like the CIA, NSA, and NRO typically require a full-scope (lifestyle) polygraph covering drug use, financial issues, and personal conduct. The DIA and NGA generally use the counterintelligence version, which focuses on espionage, unauthorized disclosures, and foreign contacts.¹³ Standard Department of Defense positions at the Secret or Top Secret level usually do not require a polygraph at all.

Special Access Programs (SAPs) are even more restrictive, limiting access to the smallest possible group with a direct need to know. Holding a Secret or Top Secret clearance does not automatically grant SAP access. Each program has its own approval process.

Continuous Vetting After You’re Cleared

The old model of periodic reinvestigations every five, ten, or fifteen years has been phased out.¹⁴ Under Trusted Workforce 2.0, the federal government now uses continuous vetting, a system of automated record checks pulling data from terrorism databases, criminal records, credit reports, foreign travel records, financial activity logs, and public records.¹⁵ When a check triggers an alert, DCSA verifies it and determines whether the individual still meets clearance requirements.

The entire national security workforce was enrolled by the end of 2022, and enrollment of the non-sensitive public trust workforce was expected to be complete around the end of 2025.¹⁴ Agencies are also required to eliminate periodic reinvestigations entirely.¹⁶ The practical effect: a sudden accumulation of debt, a criminal arrest, or unreported foreign travel is now far more likely to be flagged quickly.

If Your Clearance Is Denied

If adjudication turns up disqualifying information, you’ll receive a Statement of Reasons — a written document laying out, as specifically as national security allows, why the government is proposing to deny or revoke your clearance.¹⁰ This is not the final word.

Under Executive Order 12968, you have the right to reply in writing with mitigating evidence, request reasonably available documents used against you, and appear in person before a review panel that includes at least one member outside your chain of command or agency. You can be represented by an attorney or personal representative at your own expense.² For Department of Defense contractor cases, the appeal goes to the Defense Office of Hearings and Appeals, where an administrative judge conducts a hearing at which you can present witnesses, submit documentary evidence, and testify. An adverse decision can be appealed to the DOHA Appeal Board for final review.

Applicants who respond thoroughly do sometimes overturn initial denials. Treat the response like building a legal case: letters from supervisors, financial records showing debts being resolved, completion certificates from treatment programs, and anything else that demonstrates the concern has been addressed. Explanations alone rarely move the needle. Documentation does.

1
National Archives. Executive Order 13526 – Classified National Security Information
2
GovInfo. Executive Order 12968 – Access to Classified Information
3
Defense Counterintelligence and Security Agency. Security Assurances for Personnel and Facilities
4
Defense Counterintelligence and Security Agency. Interim Clearances
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U.S. Office of Personnel Management. SF 86 – Questionnaire for National Security Positions
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Defense Counterintelligence and Security Agency. Completing Your Investigation Request in e-QIP – Guide for the Standard Form SF 86
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Defense Counterintelligence and Security Agency. Common SF-86 Errors and Mistakes
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Office of the Law Revision Counsel. 18 USC 1001 – Statements or Entries Generally
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Health.mil. Security Clearances and Psychological Health Care
10
Office of the Director of National Intelligence. Security Executive Agent Directive 4 – National Security Adjudicative Guidelines
11
U.S. Department of State. Dual Citizenship – Security Clearance Implications
12
Defense Counterintelligence and Security Agency. Adjudications – Whole Person Concept
13
IntelligenceCareers.gov. Security Clearance Process
14
Performance.gov. Trusted Workforce 2.0 Transition Report
15
Defense Counterintelligence and Security Agency. Continuous Vetting
16
Office of Personnel Management. Streamlining Vetting Processes in Support of the Merit Hiring Plan