On-Site Senior System Administrator TS/SCI (Columbia, MD)

AT&T; New York (NY); 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 and Holidays

Paid Parental Leave

Paid Caregiver Leave

Life and AD&D insurance

Employee discounts

Job summary

AT&T Global Public Sector is seeking a Senior System Administrator to maintain, document, and administer enterprise IT systems. This role includes helpdesk support, problem resolution, and ensuring availability, reliability, and security.

Responsibilities include installing, configuring, monitoring, patching, and maintaining systems across Windows, Linux, VMware, and applications; administering users and access controls; and performing backups, disaster recovery, and vulnerability remediation.

Qualifications

• Bachelor's degree in information technology, computer science, engineering, or 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 hardware, software, access, performance, connectivity issues.
• Perform root-cause analysis and implement corrective actions.
• Administer user accounts, permissions, and access controls.
• Support backups, restoration, and continuity procedures.
• Implement security patches, configuration changes, and vulnerability remediation.
• Monitor system health, capacity, performance, services, logs, and storage.
• Maintain system documentation, SOPs, manuals, work logs, and tickets.
• Support configuration management, change control, 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 information assurance and access-control requirements.

Skills

Incident resolution

System maintenance

Technical documentation

Change-control processes

Education

Bachelor's degree in information technology, computer science, engineering, or related field

Job description

AT&T Global Public Sector is seeking a Senior System Administrator to maintain, document, and administer enterprise IT systems. This role includes helpdesk support, problem resolution, and ensuring availability, reliability, and security.

Responsibilities include installing, configuring, monitoring, patching, and maintaining systems across Windows, Linux, VMware, and applications; administering users and access controls; and performing backups, disaster recovery, and vulnerability remediation.