Senior ISSO: DoD Cyber Defense & RMF Leader

Sigma Defense; Grand Forks (ND); On-site; USD 110,000 - 115,000; Full time

Benefits offered by this job

Dental & Vision Insurance

Medical Insurance with HSA/FSAs

Life and AD&D

Employee Assistance Program

401(k) with Company Match

Paid Time Off (PTO) 160 hours

12 Holidays

Educational Assistance

Job summary

Sigma Defense in Grand Forks AFB, ND seeks an Information System Security Officer (ISSO) to join our team. You will support development, assessment, and maintenance of cybersecurity architecture and RMF authorization packages for DoD systems.

The role requires 3–5 years’ information security experience, RMF expertise, and US citizenship with ability to obtain TS/SCI clearance. You will work with system owners and vendors to ensure compliance and robust cyber defense.

Qualifications

• Minimum 3–5 years of relevant information security experience.
• Experience with RMF, security controls, and ATO processes.
• Must be a U.S. citizen and eligible for a TS/SCI clearance.
• Strong knowledge of cyber security testing methods and assessments.

Responsibilities

• Provide advanced cybersecurity support across DoD combat systems and networks.
• Maintain RMF packages, assessment artifacts, and defensive cyber measures.
• Support acquisition lifecycle activities for systems in development, production, and upgrades.
• Lead vulnerability assessments, STIGs, and cyber test strategy in virtual test environments.

Skills

RMF experience

Information assurance

Cybersecurity testing

US citizenship

Cybersecurity policy understanding

Education

Bachelor's degree in Cyber Security/IT

Job description

Sigma Defense in Grand Forks AFB, ND seeks an Information System Security Officer (ISSO) to join our team. You will support development, assessment, and maintenance of cybersecurity architecture and RMF authorization packages for DoD systems.

The role requires 3–5 years’ information security experience, RMF expertise, and US citizenship with ability to obtain TS/SCI clearance. You will work with system owners and vendors to ensure compliance and robust cyber defense.