Mission-Critical LMR Systems Administrator (TS/SCI)

AT&T; Maryland; On-site; USD 72,000 - 124,400; 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

Adoption Reimbursement

Disability Benefits

Life and AD&D Insurance

Employee Discounts

Job summary

AT&T Global Public Sector is seeking an LMR System Administrator to support land mobile radio infrastructure at a government site in Columbia, MD. This role emphasizes security monitoring, log analysis, and incident response to maintain compliant, available communications systems.

The ideal candidate will have TS/SCI with polygraph clearance, experience with mission-critical networks, and strong collaboration with security, engineering, and vendor teams.

Qualifications

• Experience administering, monitoring, or supporting mission-critical communications, infrastructure, network, or security systems.
• Working knowledge of system logging, log review, vulnerability scanning, and security monitoring concepts.
• Ability to analyze scan results, identify trends, and recommend practical remediation steps.
• Strong troubleshooting skills with the ability to investigate technical issues across systems, tools, and operational processes.
• Ability to document technical findings clearly and communicate risks, impacts, and recommendations to technical and non-technical stakeholders.

Responsibilities

• Collect, review, and maintain system logging data to support operational monitoring, audit readiness, and security compliance.
• Support the transfer, retention, and analysis of logs across approved tools and repositories.
• Review vulnerability scans, monitoring outputs, and system reports to identify issues requiring investigation or remediation.
• Search for anomalies, unusual activity, configuration drift, and indicators of system or security concern.
• Perform deep-dive analysis into LMR system health, configuration, availability, and security posture.
• Partner with the tools team to identify process efficiencies, reporting improvements, and opportunities for automation.
• Work closely with the security team to review scan results, prioritize findings, and implement approved adjustments or remediation actions.
• Interface with LMR vendors and service providers to coordinate system updates, patching activities, maintenance windows, and regular technical syncs to ensure security compliance and alignment with customer requirements.
• Document findings, actions taken, risks, and recommended improvements in support of ongoing compliance and operational reporting.
• Assist with maintaining secure configurations, monitoring practices, and system administration procedures aligned with customer and enterprise requirements.
• Support incident response, troubleshooting, and root-cause analysis for LMR system issues as needed.

Skills

Experience with mission-critical comms

Logging & security monitoring

Troubleshooting across systems

Technical documentation

Cross-functional collaboration

Vendor coordination

Security incident response

Education

Highschool Diploma/GED

Job description

AT&T Global Public Sector is seeking an LMR System Administrator to support land mobile radio infrastructure at a government site in Columbia, MD. This role emphasizes security monitoring, log analysis, and incident response to maintain compliant, available communications systems.

The ideal candidate will have TS/SCI with polygraph clearance, experience with mission-critical networks, and strong collaboration with security, engineering, and vendor teams.