Network / Systems Engineer

Support Tech LLC; United States; Remote; USD 90,000 - 130,000; Full time

Job summary

Support Tech LLC in the United States is seeking a hands-on Network / Systems Engineer to design, configure, implement, troubleshoot, and validate network and Microsoft 365 infrastructure projects for our clients.

The ideal candidate will own technical implementation from pre-staging through final validation, work with clients remotely, and handle firewall, UniFi, VPN, cloud migrations, and documentation.

Qualifications

• Professional experience in network or systems engineering.
• Strong understanding of TCP/IP, VLANs, routing, switching, DHCP, DNS, and troubleshooting.
• Experience configuring managed switches and firewalls.
• Experience with wireless networking and access-point deployments.
• Ability to troubleshoot complex infrastructure issues independently.
• Experience performing production cutovers and maintenance-window work.
• Strong documentation and technical communication skills.
• Ability to work directly with clients and communicate issues clearly.
• Ability to follow project scopes and change-control procedures.

Responsibilities

• Design and implement LAN/WAN infrastructure per approved project requirements.
• Configure and deploy next-gen firewalls, switches, wireless APs, VPNs and related gear.
• Configure VLANs, L3 interfaces, DHCP relay, routing, firewall policies and segmentation.
• Manage UniFi Network Controller environments and related infrastructure.
• Implement SSL VPN, remote-access solutions and monitor via SNMP.
• Prepare accurate network diagrams, inventories, and documentation; handoff to support.

Skills

TCP/IP

VLANs

Routing

Switching

Network Troubleshooting

Documentation

Client communication

Project work

Tools

UniFi Network Controller

Firewalls

Job description

Location: United States

This is a remote position.

We are seeking a hands-onNetwork / Systems Engineerto design, configure, implement, troubleshoot, and validate network and Microsoft 365 infrastructure projects for our clients.

This role is responsible for turning approved technical designs and project scopes into reliable production environments. Projects may include network infrastructure refreshes, firewall and switch deployments, UniFi implementations, wireless deployments, VLAN segmentation, VPN configuration, Microsoft 365 migrations, multifactor authentication, cloud migrations, and infrastructure cutovers.

The ideal candidate is comfortable working both independently and directly with clients and can take ownership of technical implementation from pre-staging through final validation and documentation.

Requirements

Network Engineering

• Design and implement LAN/WAN infrastructure according to approved project requirements.
• Configure and deploy next-generation firewalls, managed switches, wireless access points, controllers, VPN solutions, and related network equipment.
• Configure VLANs, Layer 3 interfaces, DHCP relay, routing, firewall policies, WAN failover, monitoring, and network segmentation.
• Configure corporate, guest, voice, wireless-management, security, server, and other required network segments.
• Configure and manage UniFi Network Controller environments and UniFi switching and wireless infrastructure.
• Configure LACP, VLAN trunks, port profiles, PoE, spanning-tree, loop protection, DHCP trust, and related switching functions.
• Implement and validate SSL VPN and remote-access solutions.
• Configure SNMP monitoring and integrate infrastructure into remote-management platforms.
• Perform wireless deployments, RF configuration, SSID configuration, client isolation, roaming validation, and wireless performance testing.

Microsoft 365 / Cloud Engineering

• Support Microsoft 365 tenant configuration and migration projects.
• Configure migration tooling, source/target connections, service accounts, application consent, and identity mappings.
• Support Exchange Online, OneDrive, SharePoint, Teams, and file-server migration activities.
• Configure and validate Microsoft 365 domains, DNS records, mail flow, SPF, DKIM, and DMARC.
• Implement Microsoft 365 Conditional Access and multifactor authentication configurations.
• Assist with Microsoft Authenticator enrollment and user validation.
• Perform migration reconciliation, exception analysis, and post-migration validation.

Implementation & Cutover

• Pre-stage equipment, firmware, configurations, and migration environments before production changes.
• Perform network and infrastructure cutovers during approved maintenance windows.
• Gracefully decommission and replace legacy infrastructure.
• Validate connectivity, routing, authentication, applications, wireless, voice, backups, monitoring, and other in-scope services after implementation.
• Troubleshoot issues encountered during implementation and determine whether they fall within the approved scope.
• Support rollback procedures when required.

Documentation

• Maintain accurate network diagrams, IP inventories, VLAN documentation, switch port maps, wireless information, configuration records, and equipment inventories.
• Document migration results, exceptions, validation results, and final configurations.
• Archive relevant legacy configurations and document replaced equipment.
• Prepare technical handoff information for the support team.

Required Qualifications

• Demonstrated professional experience in network or systems engineering.
• Strong understanding of TCP/IP, VLANs, routing, switching, DHCP, DNS, and network troubleshooting.
• Experience configuring managed network switches and firewalls.
• Experience with wireless networking and access-point deployments.
• Ability to troubleshoot complex infrastructure issues independently.
• Experience performing production cutovers and maintenance-window work.
• Strong documentation and technical communication skills.
• Ability to work directly with clients and communicate technical issues clearly.
• Ability to follow defined project scopes, implementation plans, and change-control procedures.

Preferred Qualifications

• Experience withUbiquiti UniFinetworking equipment and UniFi Network Controller.
• Experience with Microsoft 365, Exchange Online, SharePoint, OneDrive, Teams, and Microsoft Entra.
• Experience with Conditional Access and MFA.
• Experience with network monitoring and SNMP.
• Experience with cloud-to-cloud and file-server migrations.
• Experience with VPN technologies and WAN failover.
• Experience with wireless heatmap surveys and RF optimization.
• Experience supporting low-voltage/network infrastructure deployments.
• Relevant networking or Microsoft certifications.