Washington, District Of Columbia

Secure our Nation, Ignite your Future

Become an integral part of a diverse team while working at an Industry Leading Organization, where our employees come first.  At ManTech International Corporation, you’ll help protect our national security while working on innovative projects that offer opportunities for advancement.

Currently, ManTech is seeking a motivated, career and customer-oriented Senior Security Specialist to join our team in the Washington, DC


Provides advice and counsel to Federal personnel with respect to the protection of National Security Information (NSI). Makes recommendations on policies and guidelines in accordance with federal mandates.

Support the management of the EPA NSI Program in accordance with current federal requirements to include, but not limited to:

• Managing EPA’s classified material inventory and access to it, to include markings, storage, handling and transportation of classified materials

• Managing Secure Accredited Facilities (SAFs) and Secure Compartmented Information Facilities (SCIFs), and performing regular accreditation reviews to ensure all spaces where classified operations may be performed are built and maintained appropriately

• Supporting new construction of EPA accredited spaces, including the detailed review of construction plans and specifications, and providing feedback on areas of non-compliance with agency requirements.

•Performing audits of derivatively classified material to ensure marking accuracy; facilitating the development of classification and de-classification guides, if required

•Ensuring the agency can process classified information on the Homeland Secure Data Network (HSDN) and the Joint Worldwide Intelligence Communications System (JWICS)

•Issuing HSDN Tokens and verifying JWICs access

•Monthly testing of STEs and secure faxes

•Supporting Federally mandated nationwide inspections and assessments of Program Offices, Regions and Laboratories that handle NSI and SCI material

•Conducting preliminary inquiries to resolve classified security breaches and violations

•Conducting interviews of clearance holders, annually, to determine the level of understanding of and compliance with the program’s requirements

•Developing and conducting a variety of security trainings, including: indoctrinations, debriefs, foreign travel briefs and courier briefs

•Developing and tracking completion of computer-based training for derivative classifiers, Security Executive Agent Directive (SEAD) 3 requirements, NSI and SCI annual refresher training

•Tracking foreign travel and foreign contacts of SCI access holders and SEAD 3 covered individuals and providing required training and guidance

•Preparing SOPs on all facets of the NSI Program and developing best practices for operating its program

Basic Qualifications:

  • Must hold and maintain a Top Secret clearance, and have been indoctrinated into and/or held active SCI access within the previous 12 months
  • Must have a minimum of 6 years of experience in the security field supporting a National Security Information program.
  • Must have a Bachelors Degree from an accredited school or university (waivers may be provided for exceptional candidates)
  • Excellent attention to detail
  • Excellent verbal and written communication skills
  • Adept at meeting evolving mission needs
  • Strong commitment to customer service

Preferred Qualifications:

  • A proven track record of success supporting the implementation of new federal security directives and requirements     
  • Strong analytical skill and problem-solving skills
  • Ability to multi-task different projects at one time
  • Independent self-starter, proactive and professional

Security Clearance Requirements:

  • Active Top Secret/SCI Access

Physical Requirements:

  • Sedentary Work

For all positions requiring access to technology/software source code that is subject to export control laws, employment with the company is contingent on either verifying U.S.-person status or obtaining any necessary license. The applicant will be required to answer certain questions for export control purposes, and that information will be reviewed by compliance personnel to ensure compliance with federal law. ManTech may choose not to apply for a license for such individuals whose access to export-controlled technology or software source code may require authorization and may decline to proceed with an applicant on that basis alone.

ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment because of race, color, sex, religion, age, sexual orientation, gender identity and expression, national origin, marital status, physical or mental disability, status as a Disabled Veteran, Recently Separated Veteran, Active Duty Wartime or Campaign Badge Veteran, Armed Forces Services Medal, or any other characteristic protected by law.

If you require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please contact ManTech's Corporate EEO Department at (703) 218-6000. ManTech is an affirmative action/equal opportunity employer - minorities, females, disabled and protected veterans are urged to apply. ManTech's utilization of any external recruitment or job placement agency is predicated upon its full compliance with our equal opportunity/affirmative action policies. ManTech does not accept resumes from unsolicited recruiting firms. We pay no fees for unsolicited services.

If you are a qualified individual with a disability or a disabled veteran, you have the right to request an accommodation if you are unable or limited in your ability to use or access http://www.mantech.com/careers/Pages/careers.aspx as a result of your disability. To request an accommodation please click careers@mantech.com and provide your name and contact information.

Washington, District Of Columbia

ManTech was founded in 1968 to provide advanced technological services to the United States government. We began with a single contract with the U.S. Navy to develop war-gaming models for the submarine community. Over the years, our government's technology needs have increased dramatically in scope and sophistication, and we have grown to meet that challenge.


For more than 4 decades, we kept a careful eye on where emerging technologies were taking the government, and we developed the resources to master those technologies—by staying close to our customers and anticipating their needs, hiring talented professionals to propel us into the future, and acquiring companies with proven capabilities.


Today, we are a multi-billion-dollar public company that provides the innovation, adaptability, and critical thinking our government needs for success in defense, intelligence, law enforcement, science, administration, health, and other fields—throughout the nation and in many countries throughout the world. We are now applying the lessons learned in the unforgiving arena of national security to help the private sector protect networks and critical information.

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