ISSO/Systems Administrator

NS2 Mission
United States, Virginia, Chantilly
15040 Conference Center Drive (Show on map)
Jan 07, 2026
NS2 Mission is seeking a highly skilled Information Systems Security Officer (ISSO) / Systems Administrator to support a Cyber Security team located in Chantilly, VA. This role operates at the Subject Matter Expert (SME) level and is responsible for ensuring the security, compliance, and operational effectiveness of systems supporting mission-critical services. The ideal candidate will provide technical guidance within technical services across desktop computing, voice communications, and audio/video capabilities. The ISSO / Systems Administrator will provide Certification & Accreditation (C&A) / Assessment & Authorization (A&A) support, guide systems through the Risk Management Framework (RMF), and assist in maintaining a robust Information Security Program. Key Responsibilities Provide Certification and Accreditation (C&A) / Assessment & Authorization (A&A) support throughout the system lifecycle Run and execute the A&A process, including greenlighting records Develop, update, and maintain System Security Plans (SSPs) and supporting RMF documentation Conduct and manage security scans and vulnerability assessments Mitigate findings and support remediation activities Perform system security updates, patching, and hardening Windows and Linux environments Support configuration management, system administration, and deployment of laptops and endpoints Shepherd systems through the Sponsor's security and authorization processes Assist with maintaining and improving the formal Information Security Program Provide recommendations for continuous improvement of security processes and system architectures Coordinate closely with GTM and Sponsor staff to ensure technical and operational effectiveness Provide technical guidance and oversight to both technical and non-technical stakeholders, including senior leadership Required Skills & Qualifications Bachelor's degree in Management Information Systems, Information Assurance, Computer Engineering, or a closely related IT or cybersecurity discipline, or equivalent relevant work experience Demonstrated experience with the Risk Management Framework (RMF) methodology Experience managing document repositories and databases Experience using process tracking and document control software Strong written and verbal communication skills, including briefing experience Ability to provide technical guidance to senior-level technical and non-technical personnel Proven ability to organize, plan, and prioritize multiple tasks while meeting deadlines In-depth knowledge of INFOSEC policies, regulations, and guidance Experience with cyber risks such as malware, zero-day exploits, and denial-of-service attacks, including mitigation strategies Demonstrated commitment to excellent customer service and collaboration across all organizational levels Desired Skills & Certifications Experience with the Sponsor's Assessment & Authorization (A&A) process CISSP (Certified Information Systems Security Professional) certification Knowledge of the Sponsor's standard project lifecycle Experience supporting complex enterprise IT environments, including: Multiple operating systems Major application systems Network architectures Position Clearance Requirement: TS/SCI FSP Please be aware many of our positions require the ability to obtain or maintain a U.S security clearance which requires U.S citizenship. We win with inclusion NS2 Mission's culture of inclusion, focus on health and well-being, and flexible working models help ensure that everyone - regardless of background - feels included and can run at their best. At NS2 Mission, we believe we are made stronger by the unique capabilities and qualities that each person brings to our company, and we invest in our employees to inspire confidence and help everyone realize their full potential. We ultimately believe in unleashing all talent and creating a better world. NS2 Mission is committed to the values of Equal Employment Opportunity and provides accessibility accommodations to applicants with physical and/or mental disabilities. If you are interested in applying for employment with NS2 Mission and are in need of accommodation or special assistance to navigate our website or to complete your application, please send an e-mail with your request to Recruiting Operations Team: NS2Mission.Careers@sapns2.com. Qualified applicants will receive consideration for employment without regard to their age, race, religion, national origin, ethnicity, age, gender (including pregnancy, childbirth, et al), sexual orientation, gender identity or expression, protected veteran status, or disability, in compliance with applicable federal, state, and local legal requirements.