Senior System Administrator

Omniscius Consulting; Laurel (MD); On-site; USD 100,000 - 130,000; Full time

Job summary

Omniscius Consulting is looking for an experienced Senior Systems Administrator in Laurel, MD, to manage and support the lifecycle of mission-critical applications. The ideal candidate will have strong backgrounds in Windows and Linux administration, cloud infrastructure, and automation.

Responsibilities include administering hybrid environments, implementing automation solutions, and ensuring system security and availability for national security missions. This position requires an active TS/SCI clearance and a Bachelor's degree in a relevant field.

Qualifications

• Active TS/SCI with Full Scope Polygraph required.
• Minimum 15 years of Systems Administration experience.
• Experience with cloud environments and automation.

Responsibilities

• Administer and maintain enterprise Windows Server and Linux environments.
• Perform IAVA patching and vulnerability management.
• Implement and manage Windows Group Policy Objects (GPOs).
• Develop Infrastructure as Code solutions using Terraform and Ansible.

Skills

Windows Server administration

Linux administration

PowerShell scripting

Infrastructure as Code (IaC)

AWS EC2

AWS Lambda

AWS CloudFormation

Education

Bachelor's degree in Computer Science or related field

Tools

Terraform

Ansible

Job description

We are seeking an experienced Senior Systems Administrator to support the lifecycle sustainment and modernization of mission-critical education, learning, and training applications supporting a Government enterprise. This role is ideal for an experienced systems administrator with expertise in Windows and Linux administration, cloud infrastructure, automation, and enterprise operations.

As part of a collaborative engineering team, you will administer hybrid environments, implement automation solutions, perform system maintenance, and ensure the security, reliability, and availability of enterprise systems supporting national security missions.

Position Overview

The Senior Systems Administrator will provide advanced systems administration for enterprise Windows and Linux environments spanning on-premises and AWS cloud infrastructure. Responsibilities include IAVA patching, operating system maintenance, infrastructure automation, cloud administration, PowerShell scripting, and Infrastructure as Code (IaC) initiatives supporting highly available enterprise systems.

Location: Laurel, MD

Schedule: Full-Time, Onsite

Clearance Required: Active TS/SCI with Full Scope Polygraph

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.

Required 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 supporting programs of similar scope, complexity, and technical requirements. Five additional years of relevant experience 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.

Preferred Qualifications

• PowerShell scripting
• AWS EC2
• AWS Lambda
• AWS CloudFormation
• Terraform
• Ansible
• Infrastructure as Code (IaC)
• Windows Group Policy (GPO)
• Enterprise automation
• Hybrid cloud infrastructure
• Windows Server administration
• Linux administration
• Enterprise patch management
• Experience supporting Department of Defense or Intelligence Community customers.