Senior Systems Administrator — On-Site, Suitland MD

AT&T; Columbia (MD); On-site; USD 89,000 - 220,000; Full time

Benefits offered by this job

Medical/Dental/Vision coverage

401(k) plan

Tuition reimbursement program

Paid Time Off

Job summary

AT&T Global Public Sector seeks a Senior System Administrator to maintain, document, and administer enterprise IT systems at customer sites, with a strong focus on security, availability, and reliability. Expect hands-on support across Windows, Linux, VMware, and related infrastructure, plus mentoring of junior staff.

Active TS/SCI with poly is required. Location is Suitland/Columbia, MD, with 5+ days on-site.

Qualifications

• Bachelor’s degree in information technology, computer science, engineering, or a related field.
• Eight years of relevant systems administration or infrastructure-support experience.
• Experience supporting Windows, Linux, VMware, enterprise applications, hardware, and software.
• Experience with incident resolution, system maintenance, technical documentation, and change-control processes.
• Ability to obtain and maintain required security clearance, access eligibility, and customer approvals.

Responsibilities

• Install, configure, administer, monitor, patch, upgrade, and maintain enterprise systems.
• Support Windows, Red Hat Linux, Trusted Linux, VMware, applications, endpoints, and related infrastructure.
• Troubleshoot complex hardware, software, access, performance, connectivity, and availability issues.
• Perform root-cause analysis and implement authorized corrective actions.
• Administer user accounts, permissions, and access controls.
• Support backups, restoration, recovery testing, and continuity procedures.
• Implement approved security patches, configuration changes, and vulnerability remediation.
• Monitor system health, capacity, performance, services, logs, and storage utilization.
• Maintain system documentation, SOPs, technical manuals, work logs, configuration records, and help-desk tickets.
• Support configuration management, change control, system testing, deployment, sustainment, modernization, and decommissioning.
• Coordinate with cybersecurity, network, database, software, systems engineering, and government teams.
• Provide technical guidance and mentoring to junior administrators.
• Comply with classified-information handling, Information Assurance, access-control, and customer-security requirements.

Skills

Incident resolution

System maintenance

Technical documentation

Change control

PowerShell

Bash

Python

Automation

Education

Bachelor's degree in IT / CS / engineering or related field

Job description

AT&T Global Public Sector seeks a Senior System Administrator to maintain, document, and administer enterprise IT systems at customer sites, with a strong focus on security, availability, and reliability. Expect hands-on support across Windows, Linux, VMware, and related infrastructure, plus mentoring of junior staff.

Active TS/SCI with poly is required. Location is Suitland/Columbia, MD, with 5+ days on-site.