Senior Security Adjudicator

Overview

One Federal Solution is seeking a Senior Security Adjudicator to join our team in Washington, DC. The Senior Security Adjudicator serves as a subject-matter expert responsible for adjudicating complex, high-risk, and sensitive national security cases, including appeals and exception-based determinations. This position operates with a high level of independence and decision-making authority, ensuring the consistent and accurate application of federal adjudicative standards and producing well-supported, defensible decisions capable of withstanding audit, legal, and Inspector General review.

In addition to performing advanced adjudication functions, the Senior Security Adjudicator mentors junior and mid-level adjudicators, conducts quality assurance and case reviews, and provides expert guidance to leadership. This role also advises on policy interpretation, emerging security risk trends, and adjudicative best practices to support mission effectiveness and compliance.

• Adjudicate complex, high-risk, and sensitive security clearance cases, including appeals and special determinations.
• Apply whole-person adjudication principles to evaluate risk to national security.
• Perform quality assurance and consistency reviews of adjudication decisions.
• Provide mentorship and technical guidance to junior and mid-level adjudicators.
• Advise leadership on policy interpretation, adjudicative standards, and emerging threat or risk patterns.
• Produce clear, defensible written decisions suitable for audits, legal review, and IG investigations.
• Ensure adjudication outcomes align with federal regulations, executive orders, and agency-specific guidance.

• Deep expertise in federal adjudicative guidelines and security clearance processes.
• Bachelor's degree in Criminal Justice, Security Studies, Political Science, Psychology, or a related field
• Demonstrated experience with senior-level adjudications in government or cleared contractor environments.
• 5–10+ years of experience in personnel security, background investigations, or adjudication
• Strong independent judgment and ability to make risk-based national security decisions under ambiguity.
• Proven experience handling appeals, exceptions, and complex cases.
• Excellent written and analytical skills, particularly for decision documentation.

OFS is an innovative professional services provider with over 20 years of experience supporting defense and civilian agencies. We specialize in Business Intelligence, Acquisition and Procurement, and other professional services. As a certified Service-Disabled Veteran-Owned Small Business (SDVOSB), we pride ourselves on delivering high-performance solutions and partnering with our customers to achieve exceptional enterprise-wide outcomes.