A security clearance for an ISSO job starts when an employer with a cleared contract sponsors you, not when you decide you want one. After sponsorship you complete the SF-86 questionnaire, the investigation runs, an adjudicator reviews it, and a clearance is granted. Interim Secret determinations can arrive in days to a few weeks and let you start work on many contracts. Final Secret typically takes a few months. Top Secret takes longer, often the better part of a year and sometimes more, depending on your history and the investigative backlog at the time. Those ranges move with agency workload, so treat them as orientation, not promises.
Here is how the process runs for ISSO hires specifically, what each status lets you do, and the avoidable mistakes that add months.
Step 0: Sponsorship
Only a government agency or a contractor holding a facility clearance can submit you for investigation, and only for a position that requires it. That is why ISSO postings say “must be able to obtain” (they will sponsor) or “must currently hold” (they will not wait). For a first ISSO role without a clearance, target the first kind, and target employers with enough cleared work that sponsoring a new hire is routine. Getting your first ISSO job covers where those employers are, and the federal and DoD route covers the agency side.
Step 1: The SF-86
The Questionnaire for National Security Positions, completed through the government’s online system (eApp under the NBIS transition, formerly e-QIP). It asks for residences, employment, education, foreign contacts and travel, finances, and legal history, covering a lookback of seven to ten years depending on the section. The single biggest thing you control in this whole timeline is the accuracy and completeness of this form.
Before you are sponsored, build the file
- Every address for the lookback period with dates and a person who can verify you lived there.
- Every employer with dates, addresses, and a supervisor contact. Gaps need an explanation.
- Foreign travel with dates and purpose. Foreign contacts (close and continuing relationships with foreign nationals) with names and contact details.
- References who are not relatives and who actually know you.
- Your own credit report, pulled and read, so nothing on it surprises you or the investigator.
Assembling this after sponsorship, from memory, is how a two-day task becomes a three-week delay before the investigation even opens.
Step 2: Interim determination
Once the SF-86 is submitted and initial checks clear (fingerprints, credit, criminal history), the sponsoring organization can request an interim Secret. When granted, it lets you begin work on contracts that accept interim status, which for ISSO roles is common, since much of the job is unclassified RMF documentation and eMASS work. Interim Top Secret exists but is less commonly granted and less commonly accepted by programs. An interim can be declined for issues that would not necessarily prevent a final clearance; if that happens, the final adjudication still proceeds, but your start date depends on the employer’s willingness to wait.
Step 3: Investigation
DCSA runs the investigation for DoD and its contractors. For Secret (a Tier 3 investigation) it is largely automated record checks plus follow-up on anything flagged. For Top Secret (Tier 5) it adds a subject interview and field interviews with references, neighbors, and employers. The investigation’s length depends on the complexity of your history: foreign contacts, overseas residence, debt, prior incidents, and frequent moves all add work. A straightforward file with no issues moves quickly; a file with several of those adds months, not because you are in trouble but because each item requires a person to run it down.
Step 4: Adjudication
An adjudicator applies the national adjudicative guidelines (thirteen areas including foreign influence, financial considerations, personal conduct, and use of information technology) to the completed investigation and grants, denies, or asks for more. This is the stage where honesty on the SF-86 pays off: the guidelines weigh candor heavily, and an issue you disclosed is treated differently from the same issue discovered. If you need to explain something in your history, the place to do it is the SF-86 comment field at the start, not the interview at the end.
Realistic timelines, with the caveat that they move
- Interim Secret: days to a few weeks after SF-86 submission.
- Final Secret: a few months for a clean file; longer with complications.
- Top Secret: several months to over a year, driven by the field interviews and any flagged items.
- TS/SCI with polygraph: add the agency’s polygraph scheduling to the above; some agencies run well past a year.
DCSA publishes processing-time data periodically; check the current figures rather than the ranges in any blog post, including this one.
Reciprocity: changing contracts without starting over
A current clearance in scope transfers between DoD employers under reciprocity. Your new employer’s facility security officer (FSO) verifies it in DISS (moving to NBIS) and takes ownership. That process takes days, not months, which is why “active clearance” is the most valuable line on an ISSO resume. Two things break reciprocity: the clearance lapsing (more on that below) and a move between agencies with different requirements, such as DoD to an intelligence agency requiring a polygraph.
Continuous vetting and keeping it current
Periodic reinvestigations on a fixed schedule have largely given way to continuous vetting, where automated checks run against your record on an ongoing basis. Practical implications: report what you are required to report (foreign travel, foreign contacts, financial problems, arrests) through your FSO as they happen, because the system may see them before you do. And do not let the clearance go dormant. When you leave cleared work, the clearance stays current for a limited window (commonly described as two years) during which a new sponsor can pick it up; after that, you are starting the investigation again. If you are considering a move out of cleared work, know that date.
Mistakes that add months
- Omitting something because it seemed minor or embarrassing. The omission becomes the issue.
- Inconsistent dates between the SF-86, your resume, and your references. Investigators reconcile these and every mismatch is a follow-up.
- Unreachable references. Warn them, and give current phone numbers.
- Unresolved debt with no plan. Financial considerations are among the most common issues; a payment plan on file changes the picture.
- Undisclosed foreign contacts you interact with regularly online. “I didn’t think it counted” is the phrase investigators hear most.
What to do while you wait
Earn the 8140 certification the role needs, because the clearance and the cert are the two gates and you control the timing of exactly one of them. Security+ is the usual first gate; the 8-week Security+ plan fits inside an interim window. Learn eMASS conceptually from the beginner’s guide so your first cleared week is spent working rather than orienting. And if you are starting from zero with no clearance and no experience, the sequence that gets you to the sponsorship conversation in the first place is laid out week by week in Zero to Hired.
None of this is legal advice; clearance decisions are individual, and for a specific issue in your history, a security clearance attorney is the right person to ask. For everything else about the ISSO path, the coaching call on the Work With Me page exists for exactly these questions.

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