Principal Information System Security Engineer (ISSE) at Redhorse Corporation
Chantilly, VA
$160,000–$185,000
Aug 9, 2026
Chantilly, VA
Nov 9, 2026
What this job asks for AI summary
This is an information system security engineering role at a government technology consultancy, focused on certification and accreditation, risk and vulnerability assessments, and security architecture for sensitive national-security systems. The position also carries a business development dimension — leading technical briefings and supporting capture efforts for new government contracts. It suits a seasoned security professional with deep experience in federal IA frameworks and an active TS/SCI with Full Scope Poly clearance.
Senior level · 10+ years · Bachelor's required · TS/SCI clearance · Full-time
Pay in the description: $160,000–$185,000
Advertised as Principal, but the requirements read as Senior.
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Posted 2 times — it's one opening, so apply once.
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Why we read it this way (9)
No work location is specified in the posting; given the TS/SCI with Full Scope Poly requirement, the role is almost certainly on-site at a cleared facility, but the specific metro cannot be determined from the text.
The clearance requirement is TS/SCI with Full Scope Polygraph (FS Poly), which is the most demanding variant of TS/SCI — flagged accordingly.
The degree requirement states 'Bachelor's degree (or equivalent)' for the 12+ year path and a Master's for the 10+ year path. Because equivalent experience is explicitly accepted in lieu of a Bachelor's, the degree requirement is set to None per the extraction rules; however, the Master's path sets a floor of 10 years, which is used as the overall years minimum.
The title says 'Principal' but the scope — owning a component/project, leading briefings, working with minimal supervision — is consistent with a Senior individual contributor rather than a true org-wide Principal authority. Seniority is assessed as Senior.
DIACAP, NIACAP, NIST SP 800-37, and DCID 6/3 are listed together as a required framework set; DIACAP is emitted as the primary skill with the others as alternatives to avoid duplication, but all four are genuinely required. DITSCAP appears only in the responsibilities narrative and is marked preferred.
DevSecOps and automated compliance-as-code appear under 'Desired Experience' and are marked preferred accordingly.
Cloud providers (AWS, Azure, Google Cloud) appear under 'Desired Experience' and are marked preferred; AWS is the primary with Azure and GCP as alternatives.
Ignored 1 non-technology phrase(s) as skills (responsibilities/concepts, not named tools): NIST SP 800-37.
Requires a TS/SCI clearance — the cleared population is a small fraction of this occupation, so the real candidate pool is materially smaller than the estimate below, which does not model clearance.
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