System and Network Administrator

Authority Brands•Atlanta, GA

About The Position

The Systems & Network Administrator handles day-to-day administration, monitoring, maintenance, troubleshooting, and operational support of enterprise systems and network services across corporate and distributed sites, on-premises infrastructure, and cloud-hosted environments. The role combines hands-on systems administration and network operations to support reliable, secure, and efficient technology services for internal and external users. Work is performed within established architectures, standards, security requirements, and configuration patterns. The administrator gathers requirements and operational evidence, implements approved solutions, maintains documentation, and collaborates with engineering and security teams on new designs, material architecture or topology changes, segmentation changes, and solutions outside established patterns. The role supports Windows Server and Microsoft infrastructure, including Active Directory, Microsoft 365, Entra ID, Intune, and related services. It also administers network infrastructure such as firewalls, switches, wireless access points, WAN circuits, VPNs, and SD-WAN. Responsibilities include incident response, production troubleshooting, security and change-control practices, operational documentation, automation, and coordination of site deployments and infrastructure refreshes. Participation in an infrastructure on-call rotation and scheduled after-hours maintenance windows is required.

Requirements

3+ years of hands-on systems administration, network administration, infrastructure support, or comparable experience in a multi-site production environment.
Hands-on experience administering Windows Server and core Microsoft services, including Active Directory, domain controllers, trusts, DNS, DHCP, Group Policy, and server patching.
Working knowledge of Microsoft 365, Microsoft Entra ID, Intune, Windows 10 or later, and Office 365 administration.
Experience supporting physical and virtual servers, hosted desktops, and cloud-hosted workloads; working knowledge of Azure and AWS service models.
Working knowledge of Ethernet switching, VLANs, subnetting, TCP/IP, NAT, routing fundamentals, firewalls, wireless networking, LAN/WAN services, and site-to-site VPNs.
Hands-on experience administering enterprise firewalls, switches, and wireless access points.
Experience with infrastructure monitoring, logging, backup and replication monitoring, certificate lifecycle management, configuration backups, and formal change control.
Experience troubleshooting production outages and coordinating incidents with carriers, managed service providers, cloud providers, vendors, and on-site technicians.
Ability to troubleshoot systematically, prioritize competing tasks, document evidence, communicate impact clearly, and engage engineering or security partners with useful technical context.
Clear written and verbal communication and a strong customer-service orientation.
Participation in the infrastructure on-call rotation and scheduled after-hours maintenance windows.

Nice To Haves

Bachelor's degree in computer science, information technology, or a related field, or equivalent education and relevant work experience.
Fortinet experience, including hands-on administration of FortiGate, FortiSwitch, FortiAP, FortiManager, Fortinet support workflows, and distributed SD-WAN environments.
Experience with Hyper-V, IIS, IPPBX, SaaS, IaaS, Azure, AWS virtual machines, cloud storage, backup, and monitoring.
Experience with carrier circuit turn-ups, site migrations, office openings, structured cabling coordination, and equipment refreshes.
Experience with PowerShell, infrastructure as code, or another scripting and automation language or framework.
Fortinet certification, Cisco CCNA, Microsoft certification, or a comparable infrastructure credential.

Responsibilities

Administer and support Windows Server workloads and core infrastructure services across approved physical, virtual, on-premises, Azure, and AWS environments.
Install, configure, maintain, upgrade, and troubleshoot server software and hardware, operating systems, hosted desktops, and related technology tools.
Support Active Directory and related directory services, including domain controllers, trusts, DNS, DHCP, Group Policy, authentication dependencies, user accounts, and workstations.
Support Microsoft 365, Microsoft Entra ID, Intune, Office 365 services, and assigned identity-management activities.
Execute approved server patching, driver and firmware maintenance, reboots, lifecycle activities, and remediation of failed updates.
Monitor server health, storage, service availability, scheduled tasks, application services, certificates, and system alerts; resolve routine infrastructure issues.
Monitor backup and replication jobs, investigate failures or degraded jobs, coordinate remediation, and support recovery workflows.
Support Hyper-V, IIS, SaaS, and IaaS platforms within assigned operational responsibilities; set up and maintain accounts, workstations, and hosted end-user environments as assigned.
Administer and monitor firewalls, switches, wireless access points, WAN circuits, VPNs, SD-WAN, and related network services using approved platforms and standards.
Perform approved network configuration changes, software and firmware maintenance, configuration backups, hardware lifecycle tasks, and post-change validation.
Monitor network health, site connectivity, and performance; respond to outages, degradation, alerts, and user-reported connectivity issues.
Administer DNS records and other assigned network services within established approval boundaries; maintain network inventories, circuit records, vendor information, support entitlements, licensing, and configuration documentation.
Provide day-to-day administration and troubleshooting for Fortinet environments, including FortiGate, FortiSwitch, FortiAP, and related management and support workflows.
Coordinate carrier circuit turn-ups, equipment replacements, site migrations, new-office readiness, structured cabling activities, and approved network refreshes.
Partner with engineering teams on new network designs, major topology or segmentation changes, and solutions outside established patterns.
Own troubleshooting and restoration for assigned production-system and network incidents from initial diagnosis through documented resolution or escalation.
Troubleshoot Windows services, wired and wireless connectivity, firewalls, VPNs, DNS, DHCP, routing, switching, authentication, ISP circuits, and hosted infrastructure using logs, monitoring data, packet-level evidence, and vendor diagnostics.
Respond to and resolve Tier 2 help desk requests and support internal and external users with a strong customer-service orientation.
Coordinate office and site outage response, implement approved workarounds, maintain stakeholder communications, and drive issues through resolution.
Open and manage support cases with carriers, managed service providers, cloud providers, software vendors, and hardware manufacturers; coordinate remote hands and on-site technicians when required.
Participate in root-cause analysis and document impact, findings, recovery actions, and follow-up tasks.
Participate in the infrastructure on-call rotation and scheduled after-hours maintenance windows.
Follow security standards, maintain current patch levels, and identify potential threats, vulnerabilities, or unsupported configurations.
Track SSL/TLS and SSO certificate renewals, expirations, and operational dependencies.
Use formal change control for production changes and maintain implementation, validation, and rollback plans appropriate to the risk.
Monitor infrastructure trends, outages, availability, and operational metrics; provide reports and actionable findings as requested.
Maintain accurate inventories, ownership records, patch schedules, operating procedures, as-built documentation, and decommissioning records.
Escalate material security, resiliency, architecture, segmentation, or standards concerns to the appropriate engineering or security team for review.
Build and maintain runbooks, diagrams, troubleshooting guides, site records, configuration standards, and technical documentation in approved repositories.
Use PowerShell, infrastructure-as-code concepts, or other approved scripting and automation methods to reduce repetitive work and improve consistency.
Research and evaluate new tools and solutions when requested by management, documenting operational fit, support requirements, risks, and recommendations.
Develop sufficient expertise to train staff on new technologies and operational procedures.
Identify recurring issues and recommend automation, monitoring, standardization, process improvement, or engineering review.
Partner with Help Desk, Infrastructure, Security, Cloud Engineering, Facilities, carriers, and external vendors to resolve issues and deliver approved changes.
Coordinate operational readiness for new offices, relocations, refreshes, and equipment replacements using approved designs and standards.
Validate carrier handoffs, demarcation points, equipment locations, cabling status, site access, and installation schedules.
Coordinate installation and replacement of approved servers, firewalls, switches, wireless access points, circuits, and supporting infrastructure.
Execute approved deployment and cutover runbooks, validate service after changes, and maintain as-built documentation.