Senior Systems Administrator - Hybrid Windows/Linux & Cloud

Omniscius; Laurel (MD); On-site; USD 120,000 - 150,000; Full time

Job summary

Omniscius seeks a Senior Systems Administrator to sustain and modernize mission-critical education and training applications for a Government enterprise. You will manage hybrid Windows/Linux environments, automate operations with PowerShell, and implement IaC using Terraform and Ansible in an AWS-centric setup.

The role requires TS/SCI with Full Scope Polygraph, extensive on-prem and cloud experience, and strong collaboration with cybersecurity and development teams.

Qualifications

• Active TS/SCI with Full Scope Polygraph.
• Bachelor's degree in Computer Science, Information Technology, Engineering, or a related technical discipline.
• Minimum of 15 years of Systems Administration experience; five additional years may substitute for a bachelor's degree.
• Extensive experience administering Windows Server environments including hardening, patching, upgrades, and disk management.
• Experience administering Linux server environments including patching, software maintenance, and operational support.
• Experience performing IAVA patching and compliance reporting.
• Experience maintaining and upgrading enterprise software applications.
• Experience supporting both on-premises and cloud-hosted enterprise environments.
• Strong troubleshooting, analytical, and problem-solving skills.
• Ability to work during required core business hours.
• DoD 8570 Information Assurance Technical (IAT) Level I certification is required.

Responsibilities

• Administer and maintain enterprise Windows Server and Linux environments across hybrid infrastructures.
• Perform IAVA patching, vulnerability remediation, and compliance reporting for enterprise systems.
• Execute operating system patching, upgrades, maintenance, and software deployments for Windows and Linux servers.
• Troubleshoot complex hardware, operating system, and application issues while maintaining system availability.
• Implement and manage Windows Group Policy Objects (GPOs) to support enterprise security and configuration standards.
• Develop and maintain PowerShell scripts to automate administrative and operational tasks.
• Support AWS cloud environments utilizing services such as EC2, Lambda, CloudFormation, and cloud-native scripting.
• Develop Infrastructure as Code (IaC) solutions using Terraform and Ansible for provisioning, configuration management, and automation.
• Build and maintain automation tools and system scripts that improve operational efficiency and system reliability.
• Perform software installation, upgrades, maintenance, and lifecycle support for enterprise applications.
• Collaborate with software developers, cloud engineers, cybersecurity personnel, and infrastructure teams to support mission-critical systems.
• Develop technical documentation, operational procedures, and system administration best practices.
• Support continuous improvement initiatives that enhance enterprise security, automation, and system performance.

Skills

PowerShell scripting

Hybrid cloud

Enterprise automation

Troubleshooting

Analytical thinking

Education

Bachelor's degree in Computer Science, Information Technology, Engineering, or related technical discipline

Tools

AWS EC2

AWS Lambda

AWS CloudFormation

Terraform

Ansible

GPO

Job description

Omniscius seeks a Senior Systems Administrator to sustain and modernize mission-critical education and training applications for a Government enterprise. You will manage hybrid Windows/Linux environments, automate operations with PowerShell, and implement IaC using Terraform and Ansible in an AWS-centric setup.

The role requires TS/SCI with Full Scope Polygraph, extensive on-prem and cloud experience, and strong collaboration with cybersecurity and development teams.