System & Network Administrator

Colonial Group, Inc.; Savannah (GA); On-site; USD 38,572 - 57,859; Full time

Job summary

Colonial Group, Inc. is seeking a Systems & Network Administrator to maintain and secure our hybrid on-premises and cloud infrastructure. This role will be the primary escalation point for LAN/WAN, VPN, and Microsoft 365 connectivity, applying Zero Trust principles and MFA.

You will automate routine administrative tasks with PowerShell, manage tickets in Halo ITSM, and produce audit-ready documentation while partnering with Cyber Security on incident response and remediation.

Qualifications

• Bachelor's degree in IT or related field or equivalent experience.
• 3–5 years of enterprise systems and/or network administration.
• Experience managing hybrid on-premises and cloud infrastructure.
• Experience administering Microsoft 365 (Entra ID, Intune, Exchange Online).

Responsibilities

• Maintain and secure hybrid on-premises and cloud infrastructure.
• Monitor, patch, and harden network and endpoint infrastructure.
• Automate routine administration tasks with PowerShell.
• Provide end-user and subsidiary IT support and incident response.
• Develop and maintain audit-ready technical documentation.

Skills

Analytical skills

Troubleshooting

Communication

Education

Bachelor's degree in Information Technology or related field

Tools

PowerShell

Halo ITSM

Fortinet

Intune

Entra ID

Microsoft 365

Job description

Colonial Group, Inc.

Position Title: System & Network Administrator

Req # 1686

Location: 1375 Chatham Pkwy, Savannah, GA 31405, USA

Job Function: Information Technology

Pay Type: Hourly

Job Description

Colonial Group, Inc. is a multigenerational, family-owned parent company overseeing a diverse portfolio of subsidiaries. Through our strategic infrastructure, logistics expertise, and a broad range of products and services, we create significant value for our customers while driving innovation and operational excellence.

Job Summary

Reporting to the Systems and Network Manager, with technical oversight from the Network Architect/Engineer and Systems Architect/Engineer, the Systems and Network Administrator maintains, secures, and supports Colonial Group's hybrid on-premises and cloud infrastructure. This role serves as the primary escalation point for network, systems, and endpoint issues, and the first point of contact for LAN/WAN, VPN, wireless, and Microsoft 365 (Entra ID, Intune, Teams, Teams Voice, SharePoint, and OneDrive) connectivity and access issues. The Administrator operates with a security-first mindset - applying Zero Trust principles, multi-factor authentication, and endpoint protection standards (FortiClient, Okta), and partners with the Cyber Security team on incident response and remediation. Core responsibilities include proactive monitoring and patching of network and systems infrastructure, PowerShell-driven automation of routine administrative tasks, disciplined ticket and change management using Halo ITSM, and maintaining accurate, audit-ready technical documentation. The Administrator is expected to stay current on emerging technologies, including AI-assisted administration tools such as Microsoft 365 Copilot, and to support ongoing modernization and continuous improvement across the network and systems environment.

Duties & Responsibilites

Network & Systems Infrastructure Management:

• Implement, configure, maintain, and troubleshoot Colonial Group's on-premises and cloud network and systems infrastructure, including backups, upgrades, and disaster recovery (DR) support, in accordance with documented change management procedures.

Security Patching & Vulnerability Management:

• Patch, upgrade, and harden network and endpoint infrastructure on a defined cadence.

Identity, Access & Endpoint Management:

• Administer Microsoft Entra ID, Okta, Intune, and Microsoft 365 (Teams, SharePoint, OneDrive, Teams Voice) to enforce least-privilege access, multi-factor authentication (MFA), Conditional Access, and Zero Trust security principles across users and devices.

Proactive Monitoring & Incident Response:

• Use monitoring platforms (ManageEngine OpManager, iGlass, FortiAnalyzer, FortiManager) to proactively detect, triage, escalation, and resolve network, systems, and security issues.

Automation & Process Improvement:

• Develop and maintain PowerShell scripts and automation workflows to streamline routine administration, auditing, and reporting tasks.

Ticket Hygiene & Change Management:

• Maintain disciplined ticket management in Halo ITSM - including timely creation, escalation, and closure - and participate in change management processes for infrastructure updates.

Critical Documentation:

• Develop and maintain clear, accurate, and audit-ready technical documentation for all active network electronics and related application environments, including design documents, build/runbook procedures, and support guidelines.

End-User & Subsidiary Support:

• Provide responsive, professional support to end users and team members across all Colonial Group subsidiaries, serving as a positive representative of the IT department.

Escalation Management:

• Escalate issues beyond the scope of this role to the appropriate network or systems engineer/architect, with clear context and documentation to support rapid resolution.

Vendor & Circuit Management:

• Coordinate circuit procurement, maintenance, and support with third-party carriers and vendors, and assist with contract and service-level tracking.

Security Collaboration:

• Partner with the Cyber Security team on issues with network or systems impact - including diagnosis, triage, containment, and remediation - and support broader initiatives such as endpoint detection and response and network anomaly monitoring.

Project & Initiative Leadership:

• Act as project lead for small to medium initiatives, coordinating peers, vendors, and IT management, and contributing to the organization's ongoing IT modernization roadmap.

Proactive Maintenance & Business Continuity Support:

• Participate in after-hours support during scheduled service windows or due to a production outage to support after-hours incidents and assist with periodic disaster recovery and business continuity testing.

Education and Experience

• Bachelor's degree in Information Technology, Computer Science, or a related field, or an equivalent combination of education, certifications, and hands-on experience.


• 3-5 years of progressive experience in systems and/or network administration within an enterprise, multi-site environment.


• Demonstrated experience administering hybrid on-premises and cloud infrastructure.


• Experience administering Microsoft 365 (Entra ID, Intune, Exchange Online, Teams) strongly preferred.

Knowledge, Skills and Abilities

• Solid working knowledge of Fortinet, CrowdStrike, or comparable enterprise network and security technologies.


• Working knowledge of Microsoft 365 administration, including Entra ID, Intune, Teams, SharePoint, and OneDrive.


• Understanding of Zero Trust security principles, multi-factor authentication, and endpoint detection and response.


• Scripting and automation experience (PowerShell preferred) for routine administrative and auditing tasks.


• CompTIA Network+ and Security+ certifications, or industry equivalent, held or actively pursued.


• Fortinet and/or Microsoft certifications preferred but not required; certification progress expected within the first year of employment.


• Familiarity with ITIL-aligned service management practices, including incident, problem, and change management.

Strong analytical and troubleshooting skills, with the ability to prioritize and resolve issues under pressure. Strong written and verbal communication skills to interact effectively with end users, team members, and vendors. Ability to work independently and collaboratively, and to mentor junior team members as needed. Willingness to participate in after-hours initiatives and stay current with evolving security and technology standards, including emerging AI-assisted administration tools.

Physical Requirements

• Prolonged periods of sitting and working at a computer.


• Ability to move around an office environment.


• Occasionally lift or carry up to 20 pounds.

Travel: Occasional travel between Colonial Group locations may be required, up to approximately 20%

Eligibility Requirements: Hiring is contingent upon eligibility to work in the United States.

Colonial Group, Inc. is committed to creating an environment that values and supports diversity and inclusiveness across our organizations. We encourage applications from qualified individuals who will help us achieve this mission. Colonial Group, Inc. prohibits discrimination of and will receive consideration for employment without regard to race, color, religion, sex, age, sexual orientation, gender identity, religion, national origin, disability, veteran status, or other legally protected status.

Equal employment opportunity, including veterans and individuals with disabilities.

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