Senior Network Engineer; Network Architect - Hybrid in Boston

Senior Network Engineer - Hybrid in Boston
Summary of the Role

The Senior Network Engineer position is a senior technology practitioner responsible for the collaborative design, implementation, monitoring, maintenance, and security of enterprise network infrastructure across Sim Space corporate offices and data centers across the United States and Europe.

This individual will serve as a senior technical resource and subject matter expert for both core network and network security infrastructure, helping lead operational support, architecture, modernization, and incident response efforts. The role combines traditional network engineering responsibilities with expanded ownership of network security operations, secure access technologies, firewall management, web application protection, and vulnerability management.

The successful candidate will possess deep technical expertise in enterprise networking and security technologies, strong analytical and troubleshooting skills, and the ability to lead initiatives and mentor junior engineers. Effective collaboration with infrastructure, cloud, security, and business stakeholders is critical to success in this role.

• Act as the subject matter expert for Sim Space network and network security infrastructure

• Design, implement, support, and secure enterprise network infrastructure and software‑defined networking solutions

• Configure and maintain complex VMware environments leveraging NSX‑T, DVS, and software‑defined networking technologies

• Contribute to the design and implementation of resilient, secure, and scalable network architectures

• Configure and troubleshoot virtual networking, VLANs, VRFs, traffic forwarding, and hybrid cloud connectivity

• Lead network modernization initiatives, including technology refreshes, architecture improvements and capacity planning

• Troubleshoot all levels of network connectivity issues including, but not limited to, network outages, switch failures, network performance, network interface card (NIC), cabling, TCP/IP configuration, etc.

• Perform troubleshooting of complex network and security incidents, including outages, performance issues, routing failures, VPN issues, and other network events

• Support enterprise LAN/WAN, internet connectivity, data center networking and cloud networking initiatives.

• Manage and optimize secure web access technologies including content filtering, secure web proxy, SSL inspection, DLP, and zero‑trust remote access platforms

• Administer next‑generation firewall infrastructure, including firewall policies, ACLs, NAT, IPS/IDS, VPNs, routing, segmentation, and high‑availability configurations

• Manage web application firewall (WAF) and edge security technologies, including rulesets, custom protections, bot mitigation, and application‑layer threat prevention

• Support centralized logging, security monitoring, alerting, and threat analysis activities across network and security platforms

• Assess existing network and security technologies to identify opportunities for modernization, improved security posture, and operational efficiency

• Maintain documentation, standards, and operational procedures for network and security infrastructure

• Provide technical leadership, mentorship, and guidance to junior engineers and operational staff

• Participate in maintenance activities, infrastructure upgrades, and business‑driven technology projects

• 8+ years of network engineering experience

• 5+ years of hands‑on network security or security infrastructure experience

• Strong understanding of enterprise networking concepts, protocols, and infrastructure design

• Deep knowledge of routing, switching, TCP/IP, DNS, BGP, OSPF, VLANs, VRFs, VPNs, and network segmentation

• Experience designing and supporting enterprise LAN, WAN, and data center network architectures

• Experience managing next‑generation firewalls, secure web gateways, web‑application firewalls, and zero‑trust security platforms

• Strong hands‑on experience with firewall policy management, NAT, IPS/IDS, VPN technologies, and routing protocols

• Strong understanding of web certificates, PKI, TLS/SSL encryption,…