Lead Information System Security Officer

MANTECH seeks a mission-driven Lead Information Systems Security Officer to join our dynamic cybersecurity team in Quantico, VA.

In this leadership role, you will oversee the development, implementation, and maintenance of security strategies that ensure enterprise systems are effectively protected and compliant with regulatory frameworks. You will collaborate across internal and external teams to lead efforts that secure critical infrastructure and meet accreditation requirements.

Responsibilities include, but are not limited to:

• Leading the development, execution, and management of the system security accreditation process
• Creating, reviewing, and maintaining required Body of Evidence (BOE) documentation in alignment with ICD 503 standards
• Collaborating with senior leadership, system engineers, and other ISSOs to ensure that security controls are implemented effectively and documented thoroughly
• Overseeing security assessments and managing remediation efforts to ensure continuous monitoring and compliance
• Driving strategic improvements in cybersecurity posture through policy development, automation, and process optimization
• Managing vulnerability scans and ensuring prompt mitigation of findings across enterprise systems
• Supervising security event monitoring and configuration management practices

Minimum Qualifications:

• Bachelor's degree and 10+ years of experience in Information Systems Security, or equivalent combination of education and experience
• Extensive experience leading accreditation and authorization (A&A) efforts in accordance with ICD 503 and related frameworks
• Proven ability to guide teams through security engineering lifecycle processes and manage security documentation repositories
• Advanced knowledge of configuration management, network security principles, and system vulnerability mitigation
• Demonstrated success in cross-functional collaboration and stakeholder engagement

Preferred Qualifications:

• Certified Information Systems Security Professional (CISSP)
• Experience with Sponsor-specific cyber compliance tools and platforms
• Proven ability to lead enterprise-wide security transformation initiatives
• Familiarity with cloud security architectures and hybrid environments

Clearance Requirements:

• An active TS/SCI is required but candidate is subject to a random CI 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.