System Administrator, Level I, II, III (AE26061551)

GTSC seeking System Administrators at multiple experience levels (Level I-III) to support the implementation, troubleshooting, and maintenance of IT systems and infrastructure. Candidates will be responsible for managing system operations, supporting users, and ensuring the reliability, performance, and security of enterprise environments. Level placement will be determined based on experience, technical expertise, and demonstrated capabilities., * Provide support for implementation, troubleshooting, and maintenance of IT systems

• Manage daily operations of systems including servers, storage, and network devices
• Monitor system performance and ensure availability and reliability
• Perform system configuration, patching, and upgrades for Windows and/or UNIX/Linux environments
• Troubleshoot hardware, software, and network issues and provide timely resolution
• Support users in accessing and utilizing IT systems
• Document system configurations, processes, and issue resolutions
• Support escalation processes and communicate status to stakeholders
• Maintain system security and compliance with organizational standards

Additional Responsibilities by Level:

Level I (Entry/Intermediate):

• Provide Tier 1 and basic Tier 2 support for incident resolution
• Perform routine system maintenance and monitoring
• Follow established procedures and escalate complex issues

Level II (Mid-Level):

• Perform advanced troubleshooting and root cause analysis
• Handle escalated incidents and provide detailed technical feedback
• Optimize system performance and resource utilization
• Support capacity planning and system improvements

Level III (Senior):

• Analyze and resolve complex, multi-system issues
• Support system design, architecture, and integration efforts
• Provide technical leadership and guidance to junior staff
• Evaluate and implement system enhancements to improve reliability and performance
• Understand and manage system interdependencies across enterprise environments

Experience supporting IT systems in enterprise environments (level dependent):

Level I: ~5 years or equivalent experience/training

Level II: ~10 years

Level III: ~15 years

• Requires bachelor’s degree in a technical discipline (or equivalent experience)
• Experience with Windows and/or UNIX/Linux system administration
• Familiarity with system monitoring, troubleshooting, and performance tuning
• Strong problem-solving and communication skills

Preferred Qualifications:

• Experience with tools such as VMware, ELK Stack, Tripwire, or SELinux
• Experience with virtualization, containers, and system security practices
• Knowledge of infrastructure automation or scripting (e.g., Bash, PowerShell)
• Experience in secure or regulated environments

Work Environment:

• May require participation in on-call rotation or shift work
• Work performed in a team-oriented, mission-focused environment

We believe great work starts with supporting our people. From day one, you’ll have access to generous paid time off, comprehensive benefits, and a retirement plan designed to help you plan for the future. We offer flexible and hybrid work options where possible, along with a collaborative environment that values your time, contributions, and well-being.

We’re also committed to your growth through ongoing training, educational reimbursement, and opportunities to advance your career. Whether you’re building new skills or taking the next step, you’ll find the support you need to succeed here.

• 11 paid holidays to support work-life balance
• Five weeks of PTO to start, accrued throughout the year
• A variety of medical, dental, and vision plans to fit your needs
• Company-paid life insurance and disability coverage options, including voluntary supplemental plans
• Generous 401(k) employer match for all employees, along with the potential for an additional discretionary employer contribution
• Flexible schedules designed to support both our employees and our clients
• Hybrid work options available for eligible roles
• Robust employee referral bonus program
• Investment in your growth through training and tuition reimbursement

We are consistently on the lookout for talented IT professionals to join our growing company! If you are interested in a fulfilling career that utilizes your professional skills and education at a company that values your expertise, helps you obtain and maintain a U.S. security clearance, and enables you to help strengthen the U.S. intelligence community, explore the opportunities GTSC has available now!