ISSO: RMF & ATO Expert in Cyber Defense

Sigma Defense Systems LLC; Grand Forks Air Force Base (ND); On-site; USD 110,000 - 115,000; Full time

Benefits offered by this job

Dental and Vision Insurance

Medical Insurance with HSA/FSA/DFSA

Life and AD&D coverage

401(k) Plan with Company Matching

PTO and Holidays

Educational Assistance

EAP

Job summary

Sigma Defense Systems LLC seeks an Information System Security Officer (ISSO) to join our team at Grand Forks AFB, ND. This role supports cybersecurity architecture, RMF packages, and enclave-level cyber strategies ensuring system certification requirements are met. Required 3-5 years of relevant IA/Cyber, RMF, and testing experience; U.S.

citizenship; and ability to obtain/maintain TS/SCI clearance. The team collaborates with ISSMs, system administrators, and owners to translate complex

Qualifications

• 3-5 years of relevant experience.
• IA/Cyber Security or RMF experience.
• Demonstrated knowledge of Cyber Security Testing methods and processes.
• Cyber defense policy, processes and assessments.
• Must be a U.S. citizen.

Responsibilities

• Provide advanced technical cybersecurity support across the full spectrum.
• Ensure protection, resilience, and compliance of combat systems, networks, and information systems per DoW policies.
• Support full acquisition lifecycle activities for systems in development, production, or upgrades.
• Provide engineering expertise, risk and vulnerability assessments, STIG execution, and leadership in cyber test environments.

Skills

RMF knowledge

Cybersecurity testing

Policy/compliance

Team coordination

DoD/DoW familiarity

Education

Bachelor's degree in Cyber Security or related field

Tools

STIG tooling

Security testing tools

Job description

Sigma Defense Systems LLC seeks an Information System Security Officer (ISSO) to join our team at Grand Forks AFB, ND. This role supports cybersecurity architecture, RMF packages, and enclave-level cyber strategies ensuring system certification requirements are met. Required 3-5 years of relevant IA/Cyber, RMF, and testing experience; U.S.

citizenship; and ability to obtain/maintain TS/SCI clearance. The team collaborates with ISSMs, system administrators, and owners to translate complex