Senior Security Adjudicator

One Federal Solution; Washington (District of Columbia); Hybrid; USD 90,000 - 130,000; Full time

Job summary

One Federal Solution in Washington, DC is seeking a Senior Security Adjudicator to serve as a subject-matter expert adjudicating complex, high-risk national security cases, including appeals and exception-based determinations. The role emphasizes applying whole-person adjudication principles, quality assurance, and mentorship to junior staff.

The ideal candidate will have deep expertise in federal adjudicative guidelines, a 5–10+ year track record in personnel security, and an ability to produce

Qualifications

• Demonstrated expertise in federal adjudication.
• Experience with high-risk security cases is required.
• Ability to make risk-based national security decisions under ambiguity.

Responsibilities

• Adjudicate complex, high-risk 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 patterns.
• Produce clear, defensible written decisions suitable for audits, legal review, and IG investigations.
• Ensure adjudication outcomes align with federal regulations and agency guidance.

Skills

Federal adjudicative guidelines

Security clearance processes

Judgment & risk analysis

Written & analytical skills

Education

Bachelor's degree in Criminal Justice, Security Studies, Political Science, Psychology, or related field

Job description

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.

Senior Security Adjudicator Key Duties & Responsibilities:

• 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.

Senior Security Adjudicator Qualifications & Requirements:

• 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.

About One Federal Solution (OFS):

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.