Senior Information Systems Security Officer

General information

Requisition #

R69007

Locations

USA-DC-Washington

Posting Date

06/28/2026

Security Clearance Required

TS/SCI

Remote Type

Onsite

Time Type

Full time

Description & Requirements

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 Senior Information Systems Security Officer (ISSO) to join our team in Washington, D.C. This is an on-site position.

The Senior ISSO will leverage their strong technical background and knowledge to support accreditation efforts, to include creating Body of Evidence (BOE) documentation, responding to/implementing/documenting required controls, and completing required tasks and actions.

Responsibilities Include but are not limited to:

• Create, update, maintain, and interpret required Body of Evidence (BOE) documentation to navigate system accreditation processes.
• Ensure the day-to-day implementation, oversight, continuous monitoring, and maintenance of system security configurations and practices.
• Conduct required vulnerability scans, review reports to identify vulnerabilities, and perform comprehensive vulnerability analysis.
• Develop, oversee, and track Plans of Action and Milestones (POAMs) to effectively mitigate discovered security risks.
• Coordinate with system owners, ISSMs, and team resources to diagnose operational issues and implement necessary technology solutions.
• Document and implement plans detailing security postures, proper configurations, and secure remote access capabilities for applications.

Minimum Qualifications:

• 10 + years of related information systems security experience, or a Master's degree with 7 + years of experience.
• Bachelor's degree or equivalent (6 additional years of experience) in mathematics, telecommunications, electrical engineering, computer engineering, computer science, or a closely related IT discipline.
• Significant experience navigating technical accreditation processes, meeting strict security requirements, and creating A&A Body of Evidence (BOE) documentation.
• Familiarity operating standard security and discovery tools including Tenable Nessus, Security Center, IBM Guardium, HP WebInspect, and Network Mapper (NMAP).
• Proven experience managing complex network documentation, inventorying networks, and working across large technical teams to drive a standardized security agenda.

Preferred Qualifications:

• Certified Information Systems Security Professional (CISSP) certification.
• Hands-on experience utilizing cyber risk and compliance automation tools.
• Self-starter with excellent interpersonal skills, capable of organizing boards and driving change across organizational teams.

Clearance Requirements:

• Current/Active TS/SCI Required.
• Abilty to obtain and maintain a polygraph.

Physical Requirements:

• Must be able to remain in a stationary position 50% of the time.
• Needs to occasionally move about inside the office to access file cabinets, office machinery, and other equipment.
• Frequently communicates with co-workers, management, and customers, which may involve delivering presentations.
• Must be able to exchange accurate information in these situations.

The projected compensation range for this position is $141,500.00-$236,000.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. In addition, MANTECH invests in its employees beyond just compensation. MANTECH's benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.

MANTECH 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.