Senior Network Engineer; Network Architect - Hybrid in Boston

Senior Network Engineer - Hybrid in Boston

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 in the United States and Europe. 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.

• 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 other 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 outages, switch failures, performance problems, NIC issues, cabling, and TCP/IP configuration
• Perform troubleshooting of complex network and security incidents – outages, performance issues, routing failures, VPN problems, and security 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 policy configuration, ACLs, NAT, IPS/IDS, VPNs, routing, segmentation, and high‑availability
• Manage web application firewall and edge security technologies, including rulesets, custom protections, bot mitigation, and application‑layer threat prevention
• Support centralized logging, security monitoring, alerting, and threat analysis across network and security platforms
• Assess existing network and security technologies to identify opportunities for modernization and improved security posture
• 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, certificate lifecycle management, and troubleshooting certificate‑related connectivity or inspection issues
• Experience with LAN/WAN design, IP allocations, segmentation, VLAN implementation, and hybrid cloud networking
• Proficiency with packet captures, traffic analysis, and network troubleshooting methodologies
• Familiarity with vulnerability management and security assessment tools
• Experience with monitoring and observability platforms
• Ability to lead technical implementations, infrastructure upgrades, and operational initiatives
• Ability to quickly learn and adapt to new technologies and platforms
• Strong written and verbal communication skills

• CCNP Enterprise, CCIE Enterprise Infrastructure, or equivalent networking certifications
• Experience with…