Senior Network & Security Administrator

Dominium Management Services; Farmers Branch (TX); On-site; USD 85,000 - 120,000; Full time

Job summary

Dominium is seeking an IT Network Administrator to secure and optimize our network across corporate and branch offices. You will manage routing, switching, SD‑WAN, and cloud connectivity while ensuring availability, security, and compliance.

You will troubleshoot complex issues and build automation to improve operational efficiency. You will collaborate with stakeholders to design and document infrastructure changes, maintain configuration baselines, and support disaster recovery planning with a

Qualifications

• Bachelor’s degree in information technology or related field, or equivalent experience.
• 4+ years in network administration, infrastructure support, server admin, and security operations.
• Experience with DNS, DHCP, VPN, LAN/WAN, Wi‑Fi, and VoIP in enterprise settings.
• Familiarity with routing, switching, VLANs, OSPF/BGP/EIGRP.
• Security controls: firewalls, patching, vulnerability response, IAM.

Responsibilities

• Administer, maintain, and support enterprise network infra across corporate and branch sites.
• Configure routing, switching, SD‑WAN, VLANs, and network segmentation with redundancy.
• Manage firewall policies, NAT/PAT, IPSec VPNs; central management platforms.
• Support Azure networking, ExpressRoute, VPN gateways, and cloud-on-premise connectivity.
• Monitor network health and performance; perform escalation for complex issues.
• Develop automation to streamline configuration, monitoring, and reporting.
• Document configurations, changes, and disaster recovery procedures.

Skills

DNS/DHCP

VPN/Wi‑Fi

LAN/WAN

SD‑WAN

PowerShell

Python

Firewall security

Azure networking

Threat & vulnerability

troubleshooting

Education

Bachelor’s degree in IT or related field

Tools

Cisco Meraki

Panorama

Active Directory

Azure networking tools

VMware

Job description

Dominium is seeking an IT Network Administrator to secure and optimize our network across corporate and branch offices. You will manage routing, switching, SD‑WAN, and cloud connectivity while ensuring availability, security, and compliance.

You will troubleshoot complex issues and build automation to improve operational efficiency. You will collaborate with stakeholders to design and document infrastructure changes, maintain configuration baselines, and support disaster recovery planning with a