IT Systems Administrator (Multiple Levels)

Noblis; Chantilly (VA); On-site; USD 100,000 - 228,000; Full time

Job summary

Noblis ESI seeks experienced IT Systems Administrators specializing in cloud services for classified SCIF environments. You will apply RMF and ICD-503 controls to maintain secure, highly available infrastructure across C2S and on-premises systems.

You will provide Tier II/III engineering support, enforce NIST SP 800-53 controls, manage MFA with RSA tokens, and monitor compliance using ACAS, Nessus, and Splunk in high-security settings. Some travel is required.

Qualifications

• Active Top Secret/SCI clearance with CI Polygraph.
• US Citizenship required.
• Degree in Cybersecurity, IT, CS or equivalent.
• DoD 8570/8140 IAM/IAT Level II or III certification required.
• Experience administering ACAS, Nessus, or Splunk vulnerability and logging scanners.
• Deep RMF lifecycle and ICD-503 security accreditation knowledge.
• Design and maintain secure, scalable C2S infrastructure using AWS Well-Architected.

Responsibilities

• Support classified C2S infrastructures across domains; seek efficiencies and high availability.
• Provide 100% on-site management of secure server and desktop infrastructure in classified space.
• Diagnose and resolve complex infrastructure and network failures; handle outages and changes.
• Implement, monitor and enforce security controls per NIST SP 800-53, RMF, ICD 503.
• Administer on-premises servers synchronized with classified cloud environments.
• Utilize RSA MFA to enforce secure remote access and MFA-based authentication.
• Configure and monitor continuous auditing via Splunk for compliance.
• Perform system scans (Nessus/ACAS) and remediate findings.

Skills

Top Secret/SCI clearance

US Citizenship

RMF/ICD-503 knowledge

C2S AWS infrastructure

PowerShell or Python

AD / GPOs

Education

Bachelor's degree in Cybersecurity/IT/CS or equivalent

DoD 8570/8140 IAM/IAT Level II/III certification

Tools

ACAS

Nessus

Splunk

Active Directory

GPOs

RSA MFA

AWS Well-Architected Framework

STIGs / CIS Benchmarks

Job description

Responsibilities

Noblis ESI is seeking experienced IT Systems Administrators specializing in cloud services, responsible for applying technical/functional solutions to several projects, leveraging capabilities and sharing/seeking knowledge and information across the organization.

As part of a cross-functional team, the position will optimize and secure classified IT infrastructure(s) supporting customers operating within a Sensitive Compartmented Information Facility (SCIF), ensuring maximum availability, security, and performance for critical communication, deployment, and authentication platforms. The engineer delivers Tier II/III advanced engineering support and handles limited Tier I troubleshooting, escalations as needed, while supporting the maintenance of an active Authorization to Operate (ATO) by aligning all systems with Risk Management Framework (RMF) and ICD-503 compliance standards.

Responsibilities Include:

• Support the development and management of classified Commercial Cloud Services (C2S) infrastructures across several domains, seeking to implement efficiencies and maintain a high availability requirement.
• Provide 100% on-site management of secure server & desktop infrastructure within the classified space.
• Diagnose and resolve complex infrastructure, server, and network failures; handle specialized system outages and configuration changes (mostly in a cloud environment.
• Handle limited, escalated desktop or user issues.
• Implement, monitor, and enforce technical security controls mandated by NIST SP 800-53, RMF, and Intelligence Community Directive (ICD) 503.
• Administer and synchronize secure on-premises servers with classified cloud environments.
• Utilize Microsoft tools to enforce secure baselines, deploy hardened operating system images, and push mandatory security patches to multiple endpoints.
• Administer RSA authentication tools to enforce strict Multi-Factor Authentication (MFA) and secure, identity-vetted remote access.
• Configure and monitor continuous auditing systems (such as Splunk) to log and review user and system events for compliance verification.
• Ensure user needs are met and enhance customer experience. Assist with strategic plans for future technical management and configuration. Design and Implement system changes to maintain security and usability posture.
• Conduct routine system scans using mandated automated tools (e.g., Nessus, ACAS), analyze findings, and execute remediation actions.

Required Qualifications

• Active Top Secret/SCI clearance with Counterintelligence (CI) Polygraph.
• US Citizenship is required.
• Degree in Cybersecurity, Information Technology, Computer Science, OR equivalent technical experience.
• DoD 8570/8140 IAM/IAT Level II OR III certification (e.g., Security+, CISSP, CISM, or CASP+) is required.
• Experience administering ACAS, Nessus, or Splunk vulnerability and logging scanners.
• Deep operational knowledge of the Risk Management Framework (RMF) lifecycle and ICD-503 security accreditation procedures.
• Design, provision and maintain secure, resilient, and scalable C2S infrastructure using AWS Well-Architected Framework.
• Proven experience hardening systems utilizing DISA Security Technical Implementation Guides (STIGs) and Center for Internet Security (CIS) benchmarks.
• Advanced management of Active Directory (AD), specifically focused on secure Group Policy Objects (GPOs).
• Ability to identify, analyze, and resolve unexpected challenges efficiently and effectively.
• Travel up to 10% within US.
• Lift up to 30 lbs, walk, bend, drive.

Intermediate Level

• Bachelor's degree and 6 years of experience OR Master's degree and 4 years of experience OR Associate's degree and 8 years of experience OR HS diploma/GED and 10 years of experience.
• Compensation: $99,800 - $156,050

Senior Level

• Bachelor's degree and 12 years of experience OR Master's degree and 10 years of experience OR Associate's degree and 14 years of experience OR HS diploma/GED and 16 years of experience.
• Compensation: $120,700 - $228,400

Desired Qualifications

• AWS certification is preferred.
• Expanded knowledge of Networking functions, appliances, protocols and configurations (e.g. VLAN & firewall switch/router configurations, firmware updates).
• Working knowledge of networking protocols and configurations. Configure and manage complex C2S networking components, including VPC's, subnets, Route 53, transit gateways, and load balancers.
• PowerShell or Python experience to automate configuration baseline checks and patch verification.
• Working knowledge of cybersecurity tools (e.g. SNOW, Trellix) concepts and best practices.
• Working knowledge of Linux and Linux networking internals.
• Experience with AI tools and concepts, with the ability to apply as a problem-solving technique.
• Experience with Kubernetes or Docker for container orchestration and VM management.
• Experience translating complex technical issues for non-technical stakeholders and managing vendor relationships.
• Ability to design scalable, high-availability, and cost-effective IT systems.

Overview

Overview

Noblis and our wholly owned subsidiaries, Noblis ESI and Noblis MSD, take on some of the nation’s toughest challenges, delivering advanced solutions to our customers’ most critical missions. We bring together leading scientific, engineering, and management expertise in a culture grounded in objectivity and collaboration, ensuring our work creates lasting impact across federal missions.

We work with a broad range of government agencies in the defense, intelligence, and federal civilian sectors. Learn more and find opportunities at careers.noblis.org

Why Work at Noblis

At Noblis, we share a passion for excellence and innovation, and we create an environment where people can do meaningful work while maintaining the balance that keeps them energized and fulfilled. We seek out individuals with a natural curiosity and desire to collaborate and learn. We believe our people are our greatest strength, and we consistently seek exceptionally skilled, mission‑driven professionals who care deeply about doing work that enriches lives and makes our nation safer.

Noblis has earned numerous workplace awards for our culture, our commitment to employee well‑being, and our dedication to meaningful, impactful work. We also maintain a drug‑free workplace.

Remote/hybrid status is subject to change based on Noblis and/or government requirements.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to race, color, ethnicity, sex, age, national origin, religion, physical or mental disability, pregnancy/childbirth and related medical conditions, veteran or military status, or any other characteristics protected by applicable federal, state, or local law.

If reasonable accommodation is needed to participate in the job application or interview process, to perform essential job functions, and/or to receive other benefits and privileges of employment, please contact us.

EEO is the Law|E-Verify|Right to Work

Total Rewards

At Noblis we recognize and reward your contributions, provide you with growth opportunities, and support your total well-being. Our offerings include health, life, disability, financial, and retirement benefits, as well as paid leave, professional development, tuition assistance, and work-life programs. Our award programs acknowledge employees for exceptional performance and superior demonstration of our service standards. Full-time and part-time employees working at least 20 hours a week on a regular basis are eligible to participate in our benefit programs. Other offerings may be provided for employees not within this category. We encourage you to learn more about our total benefits by visiting the Benefits page on our Careers site.

Compensation at Noblis is determined by various factors, including but not limited to, the combination of education, certifications, knowledge, skills, competencies, and experience, internal and external equity, location, clearance level, as well as contract-specific affordability, organizational requirements and applicable employment laws. The projected compensation range for this positionis based on full time status. For part time or on-call staff, compensation is proportionately adjusted based on hours worked. While monetary compensation is important, it's just one component of Noblis’ total compensation package.

Posted Salary Range

USD $99,800.00 - USD $228,400.00 /Yr.