Senior Systems Administrator – Linux, Oracle DB, Security+

Jobtailor; Springfield (VA); On-site; USD 100,000 - 140,000; Full time

Job summary

Jobtailor is seeking a senior System Administrator to support O&M activities, patching, monitoring, and customer support in a security‑driven environment. You will back up databases and servers, optimize performance, and resolve resource issues across virtual and physical systems.

The role requires Linux/UNIX expertise (RHEL/Ubuntu), Windows Server experience, Oracle DB proficiency, and a current DoD 8570 certification such as Security+ CE, CASP, or CISSP.

Qualifications

• BA/BS degree with 5+ years of relevant experience or Masters with 3+ years of experience.
• Proven experience in system administration, specifically with Linux (RHEL and Ubuntu) and UNIX in classified environments.
• Some Windows server administration experience would be good to have.
• Hands‑on experience with Oracle Database installation, maintenance, and troubleshooting.
• Experience managing both virtual and physical servers.
• Experience performing system monitoring.
• Experience with backup management.
• Experience implementing performance optimizations.
• Currently valid DoD 8570 certification such as Security+ CE, CASP, CISSP, or similar security certification.

Responsibilities

• Support application O&M activities, including patching, application monitoring, and customer support.
• Perform daily application backups.
• Monitor and optimize system performance, including CPU, memory, disk usage, and response times.
• Troubleshoot and resolve system issues related to resource usage.
• Ensure systems and databases meet security standards and comply with relevant regulations.
• Provide Tier 1 and Tier 2 support for troubleshooting, diagnosing, and resolving system and database issues.
• Coordinate recovery efforts and ensure timely resolution of problems.
• Work with cross‑functional teams and external partners to install and configure server systems.

Skills

System Administration

Linux

UNIX

Windows Server

Oracle Database

Monitoring

Backup Management

Performance Optimization

Security Certifications

Cross-Functional Collaboration

Education

BA/BS +5 years experience

Masters +3 years

Tools

RHEL

Ubuntu

Windows Server

Job description

Jobtailor is seeking a senior System Administrator to support O&M activities, patching, monitoring, and customer support in a security‑driven environment. You will back up databases and servers, optimize performance, and resolve resource issues across virtual and physical systems.

The role requires Linux/UNIX expertise (RHEL/Ubuntu), Windows Server experience, Oracle DB proficiency, and a current DoD 8570 certification such as Security+ CE, CASP, or CISSP.