Mission-Critical Systems Administrator

Adaptic LLC; Annapolis (MD); On-site; USD 68,000 - 110,000; Full time

Job summary

Adaptic LLC is seeking a System Administrator to keep mission-critical environments running, secure, and optimized. You’ll support Linux/Unix and Windows systems, manage infrastructure, and collaborate with engineering teams to ensure reliability in DoD-relevant networks.

Whether you are early in your career or an experienced practitioner, you will contribute to performance improvements, security hardening, and capacity planning while communicating status to stakeholders and leadership.

Qualifications

• Experience supporting and maintaining IT systems in Linux/Unix and Windows environments.
• Strong troubleshooting skills across systems, applications, and infrastructure.
• Experience with system monitoring, patching, and performance optimization.
• Understanding of networking concepts and system interdependencies.
• Ability to work independently and as part of a team in fast-paced environments.
• A degree in Computer Science, Information Technology, or a related field (or equivalent experience).

Responsibilities

• Supporting implementation, troubleshooting, and maintenance of IT systems across mission environments.
• Managing system infrastructure, including servers, storage, networks, and endpoints.
• Monitoring system performance and resolving issues across client/server and distributed environments.
• Providing Tier 1 and Tier 2 support, including troubleshooting and escalation of complex issues.
• Configuring and maintaining UNIX/Linux and Windows operating systems.
• Installing, patching, and upgrading system software to maintain security and performance.
• Troubleshooting hardware, software, and network-related issues across integrated systems.
• Supporting system enhancements to improve reliability, scalability, and efficiency.
• Managing system resources and performing capacity planning and optimization.
• Collaborating with engineering teams to support system integration and architecture needs.
• Communicating system status, issues, and resolutions to internal stakeholders and leadership.

Skills

Troubleshooting

Linux/Unix

Windows

Networking concepts

Team player

Independent worker

Education

Bachelor's degree in Computer Science or Information Technology or related field

Tools

VMware ESXi

Bash scripting

Python

PowerShell

Ansible

Puppet

Salt

Job description

Adaptic LLC is seeking a System Administrator to keep mission-critical environments running, secure, and optimized. You’ll support Linux/Unix and Windows systems, manage infrastructure, and collaborate with engineering teams to ensure reliability in DoD-relevant networks.

Whether you are early in your career or an experienced practitioner, you will contribute to performance improvements, security hardening, and capacity planning while communicating status to stakeholders and leadership.