Senior Cloud Systems Administrator - TS​/SCI CI Polygraph

TITLE: Senior Cloud Systems Administrator

LOCATION: Sterling, VA

CLEARANCE REQUIRED: Active DoD TS/SCI with CI Polygraph

EMPLOYMENT TYPE: Full-time, On-site

Modern Government Solutions (MGS) is seeking a Senior Cloud Systems Administrator to provide Tier 1 and Tier 2 support for secure, AWS-based enterprise systems in a classified environment. This role supports cloud infrastructure and customer applications, troubleshoots Windows and Linux systems, performs routine maintenance and patching, and ensures compliance with customer security requirements. The Senior Cloud Systems Administrator will use Service Now for ticketing and system administration, collaborate with senior engineering teams, maintain technical documentation, identify opportunities for process improvement and automation, and support customer communications while operating within Agile methodologies during scheduled hours of 10:00 AM to 6:30 PM, Monday through Friday.

• Provide Tier 1 and Tier 2 troubleshooting, maintenance, and user support for AWS cloud-based enterprise systems during scheduled hours (10:00 AM - 6:30 PM, Monday - Friday).
• Use Service Now as the primary ticketing and system administration platform.
• Support cloud infrastructure and customer applications, including Microsoft Project and SharePoint, IBM Engineering Lifecycle Management (ELM), Riskonnect, Tableau, and related tools.
• Troubleshoot and support Windows- and Linux-based servers and applications within AWS environments.
• Perform routine system and application maintenance, including monthly patching.
• Prepare, install, and maintain system components within modern cloud architectures.
• Work with identity and access management technologies, including IdAM, Active Directory, and LDAP.
• Ensure systems and applications comply with customer security requirements and processes.
• Create, update, and maintain technical documentation, including process and automation documentation.
• Identify opportunities for process improvement and automation, and document solutions accordingly.
• Support Tier 3 and Tier 4 personnel as needed and collaborate effectively within a team environment.
• Communicate clearly with technical and non-technical stakeholders, including customers and management, both verbally and in writing.
• Create and deliver briefings to customers at various levels.
• Work in alignment with Agile methodologies while applying solid engineering rigor, including configuration management and testing.

• Must possess an active Department of Defense (DoD) TS/SCI with CI Polygraph security clearance.
• Bachelor's or Master's degree in Computer Science, Engineering, or related field, or equivalent relevant professional experience.
• Must meet DoD 8570 requirements, including Security+ CE or an equivalent certification.
• 5+ years of relevant professional experience supporting cloud-based enterprise systems.
• Experience providing Tier 1 and Tier 2 troubleshooting and administrative support within AWS environments, including applications such as Microsoft Project and SharePoint, IBM Engineering Lifecycle Management (ELM), Riskonnect, Tableau, and digital modeling tools.
• Strong background supporting and solutioning complex AWS cloud infrastructures, with solid troubleshooting and problem‑solving skills.
• Familiarity with cloud architectures and services, including Active Directory (AD), LDAP, and AWS‑native services.
• Experience supporting system security requirements, verification and validation activities, and maintaining system components.
• Ability to review and respond to system alerts using monitoring and visualization tools such as Grafana.
• Responsible for routine system and application maintenance, including monthly patching.
• Experience creating and maintaining technical and process documentation, with strong administrative and engineering rigor.
• Solid understanding of working within Service Now as a system administrator.

• Experience supporting or assisting with a total system perspective, including understanding relationships, dependencies, and requirements across cloud and hybrid services,…