Senior Network & Systems Administrator (Infra & Security)

F.C. Ziegler Co.; Tulsa (OK); On-site; USD 75,000 - 110,000; Full time

Benefits offered by this job

Health insurance

Dental insurance

Vision insurance

401(k) matching

Paid time off

HSA account

FSA account

Life insurance

Employee assistance

Job summary

F.C. Ziegler Co. in Tulsa is seeking an experienced Network Systems Administrator to own the technology infrastructure powering our retail, manufacturing, and distribution operations.

You’ll serve as the primary systems administrator for our Tulsa site and partner with our Maine IT team on company-wide initiatives. This role balances hands-on technical work with infrastructure planning, cybersecurity, and continuous improvement, helping shape the organization’s technology environment and driving

Qualifications

• 5+ years of experience supporting enterprise IT infrastructure in a business environment.
• Experience with Microsoft 365, Active Directory, Entra ID (Azure AD), Exchange Online, and Group Policy.
• Experience with VMware, Hyper‑V, or similar virtualization platforms.
• Experience supporting enterprise networking, including switches, routers, wireless networks, VPNs, and firewalls.
• Experience with backup and disaster recovery solutions.
• Strong troubleshooting and analytical skills.
• Excellent communication and customer service skills.
• Ability to prioritize multiple projects while supporting business operations.

Responsibilities

• Administer and maintain Windows Server infrastructure, Active Directory, Microsoft 365, virtualization platforms, and enterprise systems.
• Manage LAN/WAN networks, wireless infrastructure, VPNs, firewalls, and network security.
• Monitor system performance, backups, storage capacity, and infrastructure health.
• Help drive infrastructure planning, technology evaluations, and continuous improvement.
• Serve as the Tier II/III escalation point for complex technical issues.
• Manage user accounts, permissions, licensing, and security access.
• Support ERP, eCommerce, and other enterprise business applications.
• Plan and coordinate maintenance, upgrades, security patching, and firmware updates.
• Administer Microsoft SQL Server operational tasks, including backups, restores, scheduled jobs, and database monitoring.
• Plan and lead disaster recovery testing and business continuity initiatives.
• Implement cybersecurity best practices including endpoint protection, MFA, vulnerability management, and security improvements.
• Maintain accurate system documentation, network diagrams, and IT standards.
• Coordinate infrastructure projects with vendors and internal stakeholders.
• Provide occasional after-hours support during maintenance windows or emergencies.
• Travel occasionally to company locations as needed.

Skills

Microsoft 365

Active Directory

Azure AD / Entra ID

Exchange Online

Group Policy

VMware

Hyper‑V

Networking

Backup & DR

Troubleshooting

Communication

Tools

Windows Server

LAN/WAN

Firewalls

Job description

F.C. Ziegler Co. in Tulsa is seeking an experienced Network Systems Administrator to own the technology infrastructure powering our retail, manufacturing, and distribution operations.

You’ll serve as the primary systems administrator for our Tulsa site and partner with our Maine IT team on company-wide initiatives. This role balances hands-on technical work with infrastructure planning, cybersecurity, and continuous improvement, helping shape the organization’s technology environment and driving