Requisition #
R64512
Locations
USA-VA-Chantilly
Posting Date
12/01/2025
Security Clearance Required
TS/SCI w/ Poly
Remote Type
Onsite
Time Type
Full time
Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we’ve been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now—unleash your potential with MANTECH!
***This is for a future opportunity***
MANTECH seeks a motivated, career and customer-oriented Counterintelligence Investigator to join our team in Chantilly, VA.
Responsibilities include but are not limited to:
Conducting comprehensive counterintelligence inquiries according to legal status, IC and DoD policies and procedures.
Identifying, evaluating, performing, and reporting on threats to agency equities using extensive knowledge of agency, IC and DoD policies and directives.
Safeguarding all case files and writing detailed reports and referrals to appropriate government agencies.
Providing investigative support for espionage damage assessments.
Conducting CI assessments and referrals of personnel for IC indicators and for CI incidents as appropriate, to include FBI 811 referrals. These duties include a comprehensive review of personnel records to validate or invalidate assertion of CI indicators; assessing and documenting CI vulnerabilities associated with agency personnel; identifying CI concerns and possible mitigations within SEAD-4 National Security Adjudicative Guidelines; and conducing CI case support for federal investigative agencies.
Managing and preparing detailed reports, based on existing investigative documentation, existing electronic databases of foreign intelligence contact information, and other CI inquiries and assessments.
Routinely briefing and providing investigative leads to the GTM as necessary.
Minimum Qualifications:
Ten (10+) years of relevant experience with Intelligence and/or Counterintelligence
Successful completion of a state or federal/military law enforcement academy or counterintelligence academy/formal training curriculum.
Interviewing, elicitation, and/or interrogation experience per the applicable level stated in the table below.
Completion of a formal state or federal training program in relevant field
Experience interacting with agencies across the DoD and IC.
Preferred Qualifications
Bachelor’s degree in foreign area studies, International Relations, security studies, History, Behavioral Science, Criminal Justice, Space Systems, or Political Science; Five (5) additional years of experience and an Associate’s degree.
Knowledge, familiarity, and/or training in adjudicative guidelines outlined in ICD 704.
Clearance Requirements:
Must have a current/active TS/SCI w/Polygraph.
Physical Requirements:
Must be able to remain in a stationary position 50%
Needs to occasionally move about inside the office to access file cabinets, office machinery, etc.
Frequently communicates with co-workers, management, and customers, which may involve delivering presentations.
Must be able to exchange accurate information in these situations.
MANTECH International Corporation considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.
If you need a reasonable accommodation to apply for a position with MANTECH, please email us at careers@mantech.com and provide your name and contact information.

MANTECH is more than a technology company. We are a company dedicated to service, and we consider our work a part of the public trust. The people of MANTECH are privileged to work for the security of the United States, the welfare of our service members and veterans, the protection of our communities, and the cause of better health care.
We have served the nation for more than 57 years, and in that time we have continually changed and grown to provide the technology that government needs to meet new challenges. We seek people with the same strong ethic of service, creativity, energy, and dedication to serving our country.
We are comprised of more than 9,800 talented employees around the world. Nearly 40% of our employees are veterans. Many others come from the Intelligence Community, Homeland Security and federal civilian agencies. We understand our customers’ challenges because we know their world firsthand.
When Federal managers and military leaders face tough challenges in cyber, data collection & analysis, enterprise IT or systems and software engineering, they turn to MANTECH to get the job done right. These professionals trust MANTECH and stay with us for years because we understand their needs and tackle their most complex challenges head on. They know that reaching their goal is our ultimate objective.