Senior Cloud Systems Administrator – AWS GovCloud & SecOps

General Dynamics Information Technology; Fairfax (VA); Hybrid; USD 140,000 - 190,000; Full time

Job summary

General Dynamics Information Technology (GDIT) in the United States is seeking a Senior System Administrator to lead design, security, and operations of complex AWS, Linux, and Windows environments for a federal law enforcement customer. The role requires an active Secret clearance with the ability to obtain Top Secret.

You will guide infrastructure modernization, automation, and continuous monitoring in high-security environments, ensuring data integrity and chain‑of‑custody.

Qualifications

• Bachelor’s degree in Computer Science, Information Technology, Cybersecurity, Engineering, or related field; or equivalent combination of education and experience.
• 6+ years of hands‑on system administration experience with both Linux and Windows Server environments.
• 3+ years architecting and managing AWS infrastructure, preferably in federal, defense, or law enforcement environments.

Responsibilities

• Architect, implement, and maintain secure, highly available AWS, Linux, and Windows Server environments supporting federal law enforcement mission systems.
• Lead modernization and migration efforts from legacy/on‑prem platforms to AWS and updated OS architectures, ensuring data integrity, evidentiary requirements, and chain‑of‑custody are maintained.
• Administer core enterprise services including Active Directory, Group Policy, DNS, DHCP, file/print, and Linux-based services in classified and sensitive environments.
• Implement and maintain security controls and hardening aligned with NIST RMF, DISA STIGs, CJIS, FISMA, and agency‑specific requirements; support ATO, audits, and continuous monitoring.
• Develop and maintain automation and infrastructure‑as‑code (e.g., Terraform, CloudFormation, Ansible; Bash, PowerShell, Python) for provisioning, configuration, patching, and compliance.
• Design and manage monitoring, logging, backup, and disaster recovery/COOP solutions (e.g., CloudWatch, CloudTrail, SIEM) to ensure high availability, resiliency, and rapid incident response.
• Troubleshoot complex system and infrastructure issues, perform root cause analysis, and drive corrective actions for mission‑critical outages or degradations.
• Collaborate with security, network, application, and program teams to translate law enforcement mission requirements into secure, scalable technical solutions and implementation plans.
• Prepare and maintain technical documentation, runbooks, and audit artifacts to support security assessments, inspections, and operational readiness.
• Serve as a senior technical escalation point and mentor for other system administrators, promoting best practices in security, automation, and reliability across the team.

Skills

RHEL admin

Linux security

AWS services

Bash scripting

PowerShell

Python scripting

Terraform

CloudFormation

Ansible

Networking basics

Security baselines

SIEM familiarity

Secure data handling

Education

Bachelor's degree in CS/IT or related

Tools

Terraform

CloudFormation

Ansible

Puppet

Job description

General Dynamics Information Technology (GDIT) in the United States is seeking a Senior System Administrator to lead design, security, and operations of complex AWS, Linux, and Windows environments for a federal law enforcement customer. The role requires an active Secret clearance with the ability to obtain Top Secret.

You will guide infrastructure modernization, automation, and continuous monitoring in high-security environments, ensuring data integrity and chain‑of‑custody.