Senior Systems Administrator

Type of Requisition:

Regular

Clearance Level Must Currently Possess:

Secret

Clearance Level Must Be Able to Obtain:

Secret

Public Trust/Other Required:

None

Job Family:

IT Infrastructure and Operations

Job Qualifications:

Skills:

Information Security, Network Storage, Solarwinds Administration, System Administration, Virtualization

Certifications:

None

Experience:

5 + years of related experience

US Citizenship Required:

Yes

Job Description:

Senior Systems Administrator

Transform technology into opportunity as a Systems Administrator with GDIT. A career in enterprise IT means connecting and enhancing the systems that matter most. At GDIT you’ll be at the forefront of innovation and play a meaningful part in improving how agencies operate.

Duties/Responsibilities:

. As a Systems Administrator Sr Advisor you will help ensure today is safe and tomorrow is smarter. Our work depends on Systems Administrator Sr Advisor joining our team to maintain an organization's computer systems' workflows and is responsible for the upkeep, configuration, and reliable operation of computer systems, including fixing network issues along with updating equipment and software.

• Provide hands-on support for network infrastructure, system configurations, hardware components, and enterprise software environments.
• Administer and maintain Network Management Systems (NMS), including SolarWinds servers, modules, and monitoring tools.
• Perform Tier 2 troubleshooting and remediation for software updates, patch deployments, and vulnerability mitigation.
• Develop and apply NMS configuration standards, topology maps, and baseline templates across Tier 1 environments.
• Install, configure, and upgrade operating systems and layered software packages across physical and virtual machines.
• Monitor system metrics and apply performance tuning techniques to optimize throughput and resource allocation.
• Implement fault-tolerant software and hardware solutions to maintain data integrity across distributed systems.
• Execute automated and manual backup routines and database archiving to ensure recoverability and continuity.
• Perform technical tasks in support of system upgrades, OS migrations, and deployment of new infrastructure components.
• Maintain technical documentation for system changes, configurations, and operational procedures.
• Conduct compliance audits of system hardware/software against security baselines and configuration standards.
• Validate system performance and security posture to meet operational and cybersecurity requirements.
• Configure and operate business systems across mainframe, mini, and client/server architectures in local and remote environments.
• Diagnose and resolve complex system-level hardware and software faults across enterprise platforms.
• Analyze system capacity trends and generate forecasts for compute, memory, and storage requirements.
• Establish and maintain system baselines; evaluate impacts of changes, upgrades, and replacements.
• Build staging environments that replicate production systems for testing and validation purposes.
• Test patches, updates, and configuration changes in staging; submit for approval prior to production rollout.
• Assess legacy systems and contribute to modernization strategies and technical roadmap development.
• Provide technical support to users for accessing and operating enterprise systems and applications.
• Share technical expertise with junior administrators through documentation, walkthroughs, and troubleshooting sessions.
• Lead technical execution of assigned tasks, including configuration, deployment, and validation activities.

Qualifications:

Education: Bachelor’s degree in computer science/systems, information systems/technology, engineering/engineering technology, software engineering/programming, management, natural sciences, social sciences, mathematics or business/finance.

Experience: This position requires a minimum of five years’ experience, of which at least three years must be specialized experience in administrating computer systems. General experience includes operations experience on a large-s