Land Mobile Radio (LMR) System Administrator (SA1.5) (Government)

AT&T•Columbia, SC

11d•Onsite

About The Position

AT&T Global Public Sector is seeking a detail-oriented LMR System Administrator to join a mission-focused team supporting critical Land Mobile Radio communications infrastructure. The role involves maintaining reliable, compliant, and secure communications systems for customer operations. The LMR System Administrator will support the operation, monitoring, security, and continuous improvement of the Land Mobile Radio environment. This role is responsible for maintaining system visibility through logging, reviewing scan outputs, identifying anomalies, supporting security posture and improvements, and partnering with internal tools and security teams to improve operational efficiency and compliance.

Requirements

Highschool Diploma/GED with 5 years of experience.
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.
Strong attention to detail and commitment to maintaining system availability, compliance, and security posture.
Ability to collaborate effectively with operations, tools, security, engineering, and customer-facing teams.
Experience coordinating with vendors, service providers, or third-party support teams to manage technical updates, compliance requirements, and recurring operational reviews.
Able to obtain/maintain TS/SCI with polygraph.

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.

Benefits

Medical/Dental/Vision coverage
401(k) plan
Tuition reimbursement program
Paid Time Off and Holidays (based on date of hire, at least 23 days of vacation each year and 9 company-designated holidays)
Paid Parental Leave
Paid Caregiver Leave
Additional sick leave beyond what state and local law require may be available but is unprotected
Adoption Reimbursement
Disability Benefits (short term and long term)
Life and Accidental Death Insurance
Supplemental benefit programs: critical illness/accident hospital indemnity/group legal
Employee Assistance Programs (EAP)
Extensive employee wellness programs
Employee discounts up to 50% off on eligible AT&T mobility plans and accessories, AT&T internet (and fiber where available) and AT&T wireline phone