Personnel Security Investigator — TS/SCI / Poly Eligible

Constellis; Arlington (VA); On-site; USD 90,000 - 130,000; Full time

Job summary

Constellis is seeking a Personnel Security General Investigator to support personnel security and adjudicative functions by reviewing, analyzing, and evaluating investigative information to determine employment suitability, fitness, credentialing, and security clearance eligibility.

This role provides investigative and administrative support to government personnel security programs and ensures compliance with guidelines and reporting requirements.

Qualifications

• Minimum five (5) years of experience conducting personnel security investigations, adjudicative reviews, or providing suitability, fitness, or security clearance recommendations.
• Active U.S. Government TS/SCI security clearance with polygraph or active TS/SCI security clearance with the ability to obtain a polygraph.
• Must possess or be able to obtain and maintain a favorably adjudicated Tier 5 (T5) Background Investigation.
• Knowledge of National Security Adjudicative Guidelines, suitability factors, and federal personnel security requirements.
• Experience preparing written security evaluations, Statements of Reasons (SORs), Letters of Inquiry (LOIs), and related adjudicative documentation.
• Working knowledge of DCSA personnel security processes and procedures.
• Experience using e-QIP, DISS, CVS/PIPS, NP2 Portal, or similar government personnel security systems.
• Strong analytical, investigative, written, and verbal communication skills.
• Proficiency with Microsoft Office Suite and related business applications.

Responsibilities

• Review, analyze, and evaluate background investigation materials and related documentation to support personnel security determinations.
• Conduct preliminary reviews of national security, suitability, and fitness cases and provide recommendations for government adjudicative review.
• Summarize investigative findings, identify relevant adjudicative concerns, and document recommended actions in accordance with established procedures.
• Corroborate, mitigate, and assess derogatory information obtained through investigative records and supporting documentation.
• Identify discrepancies, inconsistencies, or unresolved issues and recommend additional investigative actions when necessary.
• Prepare requests for additional information, investigative leads, and supporting documentation to satisfy security and adjudicative requirements.
• Review ROIs and supporting case materials for completeness, accuracy, and compliance with applicable standards.
• Draft written evaluations, statements of issues, letters of inquiry, and other personnel security documentation as required.
• Maintain case files, records, and documentation in accordance with agency and contractual requirements.
• Utilize government security systems and databases, including DISS, e-QIP, CVS/PIPS, and related personnel security platforms.
• Support the preparation and maintenance of personnel security procedures, training materials, and process documentation.
• Communicate effectively with government representatives, applicants, contractors, and employees regarding personnel security matters.
• Ensure all assigned work is completed within established timelines and quality standards.
• Perform other duties as assigned.

Skills

Analytical and investigative skills

Written and verbal communication

Education

High School Diploma

Associate's or Bachelor's degree preferred

ODNI Adjudicator Certification

Tools

Microsoft Office Suite

DISS

e-QIP

CVS/PIPS

NP2 Portal

Job description

Constellis is seeking a Personnel Security General Investigator to support personnel security and adjudicative functions by reviewing, analyzing, and evaluating investigative information to determine employment suitability, fitness, credentialing, and security clearance eligibility.

This role provides investigative and administrative support to government personnel security programs and ensures compliance with guidelines and reporting requirements.