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Information Systems Security Engineer (ISSE) III
Information Systems Security Engineer (ISSE) III-March 2024
Herndon
Mar 28, 2026
About Information Systems Security Engineer (ISSE) III

  Secure our Nation, Ignite your Future

  Summary:

  Become an integral part of a diverse team while working at an Industry Leading Organization, where our employees come first. At ManTech, 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 Information Systems Security Engineer (ISSE) III to join our team in Herndon, VA .

  Description:

  The Information System Security Engineer (ISSE) III is responsible for program planning focused on Scaled Agile Scrum activities, kick-off and monthly technical meetings and status reports, and preparation of a PMP. They provide security planning, assessment, risk analysis, and risk management across all customer domains as specified by the contract and consistent with negotiated Service Level Agreements (SLA). They recommend system-level solutions to resolve security requirements and support the enforcement of the design and implementation of trusted relationships among external systems and architectures. They design and implement security-related products on an enterprise level, then integrate products into the current environment. They participate in the change management process, including reviewing Change Requests and assisting in assessing the security impact of proposed changes. They monitor system recovery processes to ensure security features and functions are properly restored and functioning correctly following an outage, and work on project teams responsible for engineering and packaging releases to integrate within the customer's production IT environment. They report to the Cyber Services Manager IV. The ISSE III is a senior role with extensive experience in Scaled Agile methodologies for development of enterprise-level secure systems. The ISSE III supervises, and mentors subordinate project and Team ManTech staff.Basic Qualifications:

  A minimum of four (4) years of overall IT/IS experience.

  5 years of position-specific relevant experience.

  DoD 8570.01-m IAT Level II Certification.

  Bachelor’s degree in STEM or related discipline. (Can be substituted for HS diploma with 13 years of experience or Associate’s degree with 11 years of experience.)

  Experience with IA tools in audit collection, audit review, audit management, and SIEM software. Experience in the CI/CD and DevSecOps lifecycle to support Risk Management Framework (RMF) and ATO processes.

  Preferred Qualifications:

  Experience and/or certifications associated with RMF, ICD 503, NIST SP800-53 or DCID 6/3. Experience in current authorization practices, particularly within the DoD.

  Windows, Linux, UNIX, Cisco, SQL or Oracle databases, and virtualized systems certification. Red Hat Enterprise License (RHEL) Linux 7, ACAS, Tenable, and one or more SIEM certifications.

  Clearance Requirements:

  The ability to obtain and maintain a TS/SCI Eligible Clearance is required prior to starting this position.

  Must be a US Citizen.

  Physical Requirements:

  The person in this position must be able to remain in a stationary position 50% of the time. Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, via email, phone, and or virtual communication, which may involve delivering presentations.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 [email protected] and provide your name and contact information.

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