Information Systems Security Officer III (ISSO III) with Security Clearance

System High Corporation; San Antonio (TX); On-site; USD 110,000 - 150,000; Full time

Job summary

System High Corporation is seeking an Information Systems Security Manager (ISSM) II to support DoD SAP/SCI environments in the Washington-area caliber of work. The role emphasizes day-to-day security operations, RMF documentation, and collaboration with ISSM/ISO teams.

The ideal candidate will have a TS/SCI clearance with SCI eligibility, 5–7 years of related experience, and be able to satisfy DoD 8570.01-M certifications within six months of hire.

Qualifications

• TS/SCI clearance and SCI eligibility
• 5–7 years related experience in DoD/IS security
• DoD 8570.01-M IA Technician II or IA Manager II within 6 months
• Current Top Secret clearance with SCI eligibility
• Ability to regularly lift up to 50 lbs.

Responsibilities

• Perform ISSO duties in support of SAP/SCI environments.
• Prepare, review, and update RMF authorization packages.
• Coordinate changes with the ISSM and AO/DAO prior to implementation.
• Ensure security documentation and audit records are current and accessible.
• Identify and implement cybersecurity controls and countermeasures.

Skills

SAP experience

ISSO duties

Cybersecurity

Education

Bachelor's degree

Associate's degree + 2 years experience

Job description

• This position requires a TS/SCI Clearance and a minimum of two years of Special Access Program Experience* At System High Corporation-a Top Washington-Area Workplace (The Washington Post, 2023-2025), a Top Workplaces Culture Excellence honoree (April 2025), and a three-time VETS Indexes 3-Star Employer-we protect and advance the nation's most critical missions. As part of our team, you'll tackle complex security challenges across SAP, SCI, and Collateral programs. If you're driven by national security, innovation, and integrity, we want to hear from you. System High Corporation delivers the most advanced protection and secrecy solutions to secure and strengthen critical missions, programs, operations, and intelligence activities. We are seeking an Information Systems Security Manager (ISSM) II to help contribute to our success and help us solve problems with innovation through intelligence. The ISSO is responsible for ensuring the appropriate operational security posture is maintained for an information system and as such, works in close collaboration with the ISSM and ISO. The position shall have the detailed knowledge and expertise required to manage the security aspects of an information system and, in many organizations, is assigned responsibility for the day-to-day security operations of a system. This also will include physical and environmental protection, personnel security, incident handling, and security training and awareness. It will be required to work in close coordination with the ISSM and ISO in monitoring the information system(s) and its environment of operation to include developing and updating the authorization documentation, implementing configuration management across authorization boundaries. This will include assessing the security impact of those changes and making recommendation to the ISSM. The primary function is working within Special Access Programs (SAPs) supporting Department of Defense (DoD) agencies, such as HQ Air Force, Office of the Secretary of Defense (OSD) and Military Departments efforts. The position will provide "day-to-day" support for Collateral, Sensitive Compartmented Information (SCI) and Special Access Program (SAP) activities. Performance shall include:
• Develop physical or logical topologies for a system
• Assist the ISSM in meeting their duties and responsibilities
• Prepare, review, and update authorization packages
• Ensure approved procedures are in place for clearing, sanitizing, and destroying various types of hardware and media
• Conduct periodic reviews of information systems to ensure compliance with the security authorization package
• Coordinate any changes or modifications to hardware, software, or firmware of a system with the ISSM and AO/DAO prior to the change
• Monitor system recovery processes to ensure security features and procedures are properly restored and functioning correctly
• Ensure all IS security-related documentation is current and accessible to properly authorized individuals
• Ensure audit records are collected, reviewed, and documented (to include any anomalies)
• Attend required technical and security training (e.g., operating system, networking, security management) relative to assigned duties
• Execute the cyber security portion of the self-inspection, to include provide security coordination and review of all system assessment plans
• Identify cyber security vulnerabilities and assist with the implementation of the countermeasures for them
• Prepare reports on the status of security safeguards applied to computer systems
• Perform ISSO duties in support of in-house and external customers
• Conduct security impact analysis activities and provide to the ISSM on all configuration management changes to the authorization boundaries
• Conduct continuous monitoring activities for authorization boundaries under your preview
• Assist Department of Defense, National Agency and Contractor organizations with all RMF efforts Qualifications Experience:
• 5 - 7 years related experience
• Prior performance in roles such as System, Network Administrator or ISSO Education:
• Bachelor's degree OR Associate's degree in a related area + 2 years' experience OR equivalent experience (4 years) Certifications:
• Must meet position and certification requirements outlined in DoD Directive 8570.01-M for Information Assurance Technician Level II or Information Assurance Manager II within 6 months of the date of hire. Security Clearance:
• Current Top Secret Clearance with SCI Eligibility
• Eligibility for access to Special Access Program Information
• Willingness to submit to a Counterintelligence polygraph
• Other Requirements:
• Must be able to regularly lift up to 50 lbs.
• Additional Information
• This job description is not designed to cover or contain all job duties required of the employee. There may be additional activities, duties and/or responsibilities that are required for this position that are not listed in this job description.
• In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification document form upon hire.
• System High is a Military friendly employer. Our extensive work on behalf of the U.S. government offers those who have served in uniform an opportunity to continue to serve their country in a new and exciting way while enjoying a successful civilian career.
• System High values the power and strength of diverse backgrounds on the culture and performance of our company. We strive to maintain an inclusive culture to encourage each employee to bring their whole self to the mission.
• System High Corporation is committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender, gender identity or expression, veteran status, or any other characteristic protected by law. We are proud to be an equal opportunity workplace.
• If you require a reasonable accommodation to apply for a position with us, please email