Senior Linux Systems Administrator - Cloud & Security Ops

Leidos; Alexandria (VA); On-site; USD 116,000 - 210,000; Full time

Job summary

Leidos seeks a Sr Linux Systems Administrator to support cloud modernization for the US Coast Guard at C5ISC in Alexandria, VA. You will manage mission-critical Red Hat Linux and Windows Server environments in AWS and Azure, implementing security controls and high-availability configurations.

Collaborate with cloud engineers, cybersecurity analysts, and program leadership to automate provisioning with Ansible/Terraform, monitor with Datadog and CloudWatch, and ensure compliance with STIGs and

Qualifications

• Bachelor’s degree in Computer Science or related field.
• 12+ years of cloud infrastructure engineering experience (or Masters with 10+ years).
• Minimum 5+ years of administration experience with cloud-based applications (MS O365, SharePoint, Azure AD, AWS).
• Strong hands-on experience with RHEL and Windows Server environments.
• Scripting skills in PowerShell, Bash, or Python.
• Experience with security hardening standards (DISA STIGs, CIS).
• Experience with AWS and/or Azure cloud platforms.
• Experience with monitoring tools like CloudWatch, Datadog, and Prometheus.
• Experience with automation tools like Terraform or Ansible.
• Experience with virtualization and containerization (Docker, Kubernetes).

Responsibilities

• Administer, patch, and harden Red Hat Enterprise Linux (RHEL) / CentOS / Ubuntu servers supporting mission-critical applications.
• Install, configure, and maintain UiPath Orchestrator and supporting services on Linux hosts, including integration with load balancers, reverse proxies, and databases (PostgreSQL/MSSQL).
• Manage system performance, capacity planning, and troubleshooting for automation infrastructure.
• Set up virtual machines, storage, networks, and other cloud services on platforms in AWS and Azure.
• Use tools to track system health, uptime, and resource usage, ensuring optimal performance.
• Implement access controls, encryption, and security policies to protect data and meet regulatory requirements.
• Diagnosing and resolving issues related to cloud services, connectivity, or performance.
• Write scripts (e.g., in Bash, PowerShell, or Python) to automate repetitive tasks like backups, updates, and deployments.
• Automate provisioning, configuration management, and patching using Ansible, Puppet, or similar tools.
• Implement and maintain security controls in accordance with STIGs, RMF, or applicable compliance frameworks.
• Support high-availability, clustering, and disaster recovery configurations.
• Collaborate with RPA developers, DevOps, and network teams to ensure seamless automation pipeline operations.
• Manage user access, certificates, and secure service accounts.
• Support cross-functional coordination across engineering, cybersecurity, and program management teams.
• Promote continuous improvement through feedback loops and process refinement.
• Ensure alignment with USCG mission priorities and Leidos delivery standards.

Job description

Leidos seeks a Sr Linux Systems Administrator to support cloud modernization for the US Coast Guard at C5ISC in Alexandria, VA. You will manage mission-critical Red Hat Linux and Windows Server environments in AWS and Azure, implementing security controls and high-availability configurations.

Collaborate with cloud engineers, cybersecurity analysts, and program leadership to automate provisioning with Ansible/Terraform, monitor with Datadog and CloudWatch, and ensure compliance with STIGs and