Network, Systems & Cybersecurity Administrator

ES3•Warner Robins, GA

11d•Hybrid

About The Position

The Network, Systems & Cybersecurity Administrator is a full-time, hands-on role supporting secure, reliable enterprise IT services for a U.S. Department of War (DoW) contractor operating in regulated federal environments. The position supports administration, maintenance, troubleshooting, and continuous improvement across enterprise networks, Windows, macOS, and Linux systems, cloud services, identity and access management, endpoint management, virtualization, backup and recovery, collaboration platforms, and cybersecurity controls. Responsibilities include configuring and supporting network and security technologies; administering Microsoft 365, Azure, Entra ID, Active Directory, Intune, and related services; supporting Windows and Apple endpoints; automating routine administration with PowerShell or comparable tools; managing system lifecycle, patching, vulnerability remediation, logging and monitoring; assisting with incident response and disaster recovery; and providing responsive technical support to staff across multiple locations. The successful candidate will understand how security requirements influence day-to-day IT operations in the Defense Industrial Base. This includes practical knowledge of NIST SP 800-171 security requirements and controls applicable to protecting Controlled Unclassified Information (CUI) and supporting Cybersecurity Maturity Model Certification (CMMC) compliance, along with familiarity with relevant FAR and DFARS cybersecurity obligations. The role requires sound judgment, disciplined documentation, secure configuration practices, and the ability to balance operational requirements with cybersecurity and compliance objectives. Candidates should be comfortable taking ownership, working independently and collaboratively, adapting to changing priorities and technologies, and supporting projects or incidents outside normal business hours when required. As a member of our highly valued staff, you will work with modern enterprise technologies, have access to training and professional development opportunities, and contribute directly to the security, reliability, and continued growth of ES3's IT environment. This full-time position is primarily onsite at ES3's Utah operations. Qualified candidates located in Georgia may also be considered based on business needs and their ability to support the role effectively. The position supports staff and systems across multiple company locations and may require periodic travel, planned after-hours maintenance, and response to time-sensitive operational or cybersecurity events. The role works closely with technical staff, management, vendors, and other stakeholders in a collaborative, security-conscious environment.

Requirements

7+ years of current, directly relevant professional experience administering and supporting enterprise IT infrastructure, networks, systems, or cybersecurity in a production environment
Windows Server, Windows desktop, and macOS endpoint administration
Microsoft 365 administration, identity and access, and modern endpoint management
Microsoft Entra ID, Active Directory, Intune or comparable modern endpoint management, and PowerShell automation
Core network services and technologies including TCP/IP, DNS, DHCP, routing, switching, VLANs, VPNs, firewall policy, wireless networking, and secure remote connectivity
Security-focused administration of endpoints, servers, networks, and cloud services, including hardening, patching, vulnerability remediation, endpoint protection, logging, and monitoring
Working knowledge of NIST SP 800-171 security requirements and controls relevant to protecting CUI and supporting CMMC compliance; familiarity with applicable FAR and DFARS cybersecurity requirements
Microsoft Azure or comparable cloud administration experience, including hybrid identity, cloud security, resiliency, backup, and recovery concepts
Virtualization, enterprise backup, disaster recovery, and business continuity technologies and practices
Linux and macOS administration and troubleshooting in heterogeneous enterprise environments, including Apple hardware support, device configuration, endpoint security, software deployment, and lifecycle management
Experience with incident response, root-cause analysis, change and configuration management, technical documentation, and secure troubleshooting practices
Ability to independently prioritize and execute projects, coordinate with vendors, support end users, and collaborate effectively across technical and business teams
Candidate must be a U.S. Citizen
Participation in a shared after-hours support rotation is required, including occasional evening or weekend work for maintenance, deployments, outages, cybersecurity events, or other time-sensitive operational needs.

Nice To Haves

Familiarity with Group Policy and traditional domain-based administration is beneficial for supporting hybrid or legacy environments
Relevant bachelor's degree in Cybersecurity, Computer Science, Information Technology, or a related discipline preferred
Candidates without a related degree must hold a current Security+ or equivalent/higher security credential and at least one additional role-relevant industry certification, together with substantial hands-on experience
Experience with Microsoft 365 Government, GCC High, Azure Government, or other regulated government cloud environments
Experience supporting DoD, federal contractor, CUI, or similarly regulated enterprise environments
Enterprise firewall, network segmentation, routing, switching, VPN, and secure remote-access administration
Security information and event management (SIEM), centralized logging, security monitoring, and incident investigation
Endpoint detection and response (EDR/XDR), endpoint security, application control, and threat protection technologies across Windows, macOS, and other supported platforms
Identity security including MFA, Conditional Access, privileged access, least privilege, and Zero Trust concepts
Vulnerability management, secure configuration baselines, remediation tracking, and familiarity with STIG or CIS guidance
Demonstrated experience administering virtual machines, enterprise storage, backup, and recovery platforms
Unified communications, VoIP, or collaboration platform administration
Infrastructure monitoring, scripting, automation, and systems-management tools
Additional role-relevant certifications such as CCNA/CCNP, CySA+, CASP+/SecurityX, CISSP, Microsoft, Azure, or comparable credentials

Responsibilities

Configuring and supporting network and security technologies
Administering Microsoft 365, Azure, Entra ID, Active Directory, Intune, and related services
Supporting Windows and Apple endpoints
Automating routine administration with PowerShell or comparable tools
Managing system lifecycle, patching, vulnerability remediation, logging and monitoring
Assisting with incident response and disaster recovery
Providing responsive technical support to staff across multiple locations
Understanding how security requirements influence day-to-day IT operations in the Defense Industrial Base
Balancing operational requirements with cybersecurity and compliance objectives
Taking ownership, working independently and collaboratively, adapting to changing priorities and technologies
Supporting projects or incidents outside normal business hours when required