Network Administrator

SEMRHI; Hattiesburg (MS); On-site; USD 65,000 - 90,000; Full time

Job summary

SEMRHI is seeking a Network Administrator to design, implement, and manage a secure multi-site network across locations in Mississippi. You will ensure reliable WAN/LAN connectivity, configure routers, switches, and firewalls, and support VPNs while enforcing HIPAA-aligned security practices.

The role requires 3–5 years in enterprise networks, experience with UniFi/Cisco/Meraki, and familiarity with PRTG or SolarWinds. On-call duties may be required.

Qualifications

• 3-5 years of network administration experience in a multi-site enterprise environment.
• Hands-on with managed switches, firewalls and enterprise wireless platforms.
• Proficiency with TCP/IP, BGP, OSPF, VLAN, STP and QoS.
• Experience with UniFi, Cisco, Meraki or similar platforms.
• Familiarity with network monitoring tools such as PRTG or SolarWinds.
• Knowledge of HIPAA security requirements related to network infra preferred.
• CompTIA Network+, CCNA; CCNP a plus; healthcare/multi-site experience preferred.
• On-call availability for critical network incidents.

Responsibilities

• Manage LAN, WAN, and wireless infrastructure across locations.
• Configure and troubleshoot routers, switches, firewalls, and APs.
• Administer VLANs, inter-VLAN routing, and guest network isolation.
• Monitor performance and respond to alerts using network tools.
• Manage DNS, DHCP, and IPAM; maintain VPN connections.
• Support SD-WAN and cloud networking; enforce firewall policies.
• Conduct cybersecurity training and HIPAA-compliant practices.
• Review network diagrams and document assets; coordinate with vendors.

Skills

LAN/WAN administration

Firewall & VPN management

Network monitoring

On-call availability

HIPAA security awareness

Education

CCNA or equivalent certification

CCNP a plus

CompTIA Network+

Tools

UniFi

Cisco

Meraki

PRTG/SolarWinds

Job description

Job Details

Job Location: Administration - Hatiesburg, MS 39401

Job Summary

The Network Administrator is responsible for the design, implementation, management, and security of the organization's network infrastructure. This position ensures reliable and secure network connectivity across all locations, supports multi-site WAN/LAN environments, and plays a key role in infrastructure planning and network security initiatives.

Job Responsibilities

• Manage and maintain LAN, WAN, and wireless network infrastructure across all organizational locations
• Configure, monitor, and troubleshoot routers, switches, firewalls, and wireless access points
• Administer network segmentation including VLANs, inter-VLAN routing, and guest network isolation
• Monitor network performance and availability using network monitoring tools and respond to alerts
• Manage DNS, DHCP, and IP address management (IPAM) across the environment
• Maintain and troubleshoot site-to-site and remote access VPN connections
• Support and administer SD-WAN and cloud-based networking solutions as applicable
• Implement and maintain firewall policies, access control lists, and network security rules
• Cybersecurity awareness training
• Monitor network traffic for anomalies, intrusion attempts, and policy violations
• Assist with vulnerability assessments and remediation of network-level findings
• Enforce network security best practices in alignment with organizational and regulatory requirements including HIPAA
• Manage IDS/IPS systems and respond to network security events
• Participate in the design and implementation of new network infrastructure for facility expansions and new site deployments
• Evaluate and recommend networking hardware, software, and services
• Coordinate with ISPs and vendors for circuit provisioning, troubleshooting, and escalations
• Maintain accurate and up-to-date network diagrams, documentation, and asset inventory
• Support structured cabling, rack management, and data center infrastructure as needed
• Serve as a subject matter expert and escalation point for network-related issues
• Mentor junior IT staff on networking concepts and best practices
• Collaborate with systems, security, and application teams on cross-functional projects
• Communicate network status, incidents, and planned changes to IT leadership
• Performs other duties as assigned.
• Completes all required trainings prior to deadline

Qualifications

• 3-5 years of network administration experience in a multi-site enterprise environment
• Strong hands-on experience with managed switches, firewalls, and enterprise wireless platforms
• Proficiency with network protocols including TCP/IP, BGP, OSPF, VLAN, STP, and QoS
• Experience with UniFi, Cisco, Meraki, or similar enterprise networking platforms
• Familiarity with network monitoring tools such as PRTG, SolarWinds, or similar
• Knowledge of HIPAA security requirements as they relate to network infrastructure preferred
• CompTIA Network+, CCNA, or equivalent certification preferred; CCNP a plus
• Experience supporting healthcare or multi-site organizations preferred
• Must be available for on-call response to critical network incidents.

Physical and Other Requirements

• Must be able to pass a criminal background check, drug screen, and TB skin test
• Ability to work in equipment rooms and data center environments required.
• May require travel between locations for on-site network support and project work.
• Must continuously listen, visualize, and have dexterity and eye-hand coordination
• Ability for simple grasping and speed work
• Must frequently sit, squat, reach, use both right and left forearm rotation, walk and climb stairs
• Must occasionally kneel, twist, have the ability to grasp firmly, lift and carry, push and pull in excess of 30 lbs.