Principal Network Engineer

Responsibilities

• Provide Tier 3 support for enterprise LAN/WAN environments, including routers, switches, firewalls, and network security devices
• Design, implement, and maintain network infrastructure solutions aligned with established architectural standards
• Troubleshoot complex network issues and drive timely resolution to ensure service stability and performance
• Execute network changes, upgrades, and patching activities through formal change management processes
• Optimize network performance, reliability, and cost efficiency across infrastructure components
• Contribute to the delivery of moderately to highly complex projects , including planning, implementation, and validation
• Partner with internal teams (e.g., security, infrastructure, application teams) to support integrated solutions
• Design and support AWS networking solutions, including: Amazon VPCs
• Transit Gateway
• Direct Connect
• Site-to-Site VPN
• Route Tables and Network ACLs
• Security Groups
• Load Balancing and Hybrid Connectivity
• Document network designs, configurations, procedures, and support models to ensure operational continuity
• Provide technical guidance and mentorship to junior team members and support knowledge sharing within the team

Requirements

• Required
• 5+ years of experience in network engineering within enterprise environments
• Current AWS Certified Advanced Networking - Specialty certification
• Strong hands-on experience with: Cisco routing and switching (IOS, Nexus, enterprise hardware platforms)
• Network protocols (e.g., BGP, MPLS, EIGRP)
• Administering and troubleshooting WatchGuard firewall solutions, VPNs, and network security technologies
• Deep expertise designing and optimizing high-performance AWS cloud network architectures tailored for AI/ML workloads . Demonstrated ability to configure and scale data-transfer pipelines to Amazon S3 and compute clusters, managing high-bandwidth, ultra-low-latency traffic patterns.
• Knowledge of advanced networking protocols and mechanisms for AI data clusters (e.g., congestion control protocols, minimizing packet loss, and maximizing throughput) to support seamless Large Language Model (LLM) training and inference deployments
• Experience supporting and maintaining large-scale LAN/WAN environments
• Strong troubleshooting, diagnostic, and problem-solving capabilities
• Knowledge of Zero Trust and modern network security architectures
• Experience with change management and operational support processes
• Strong written and verbal communication skills
• Bachelor's degree or equivalent experience
• Preferred
• Cisco or security certifications (e.g., CCNP, CCIE, CCSE)
• Experience with network security tools (ID

Benefits

Additional Information

Sun Life U.S. is one of the largest providers of employee and government benefits, helping approximately 50 million Americans access the care and coverage they need. Through employers, industry partners and government programs, Sun Life U.S. offers a portfolio of benefits and services, including dental, vision, disability, absence management, life, supplemental health, medical stop-loss insurance, and healthcare navigation. We have more than 6,400 employees and associates in our partner dental practices and operate nationwide. Visit our website to discover how Sun Life is making life brighter for our customers, partners and communities. Job Description: Owner's mindset - architecture, design, continuous improvement, documentation. The Senior Network Engineer is responsible for the design, implementation, maintenance, and optimization of enterprise network infrastructure. This role provides advanced (Tier 3) technical support and leads the delivery of complex network solutions across LAN/WAN environments. Operating as a senior individual contributor, this role applies deep technical expertise to solve complex problems, improve system performance, and has an owner's mindset to the architecture, documentation, delivery, and continuous improvement of infrastructure initiatives. The role works independently within established standards and actively contributes to day-to-day activities and managed projects. The ideal candidate will have strong experience designing, implementing, and supporting enterprise network infrastructure, with expertise in Cisco routing and switching technologies, WatchGuard firewalls, AWS networking services, Infrastructure as Code, and utilizing Generative Developer tools. This role will be responsible for maintaining network reliability, security, and performance across both on-premises and cloud environments. Candidates who possess experience with certificate lifecycle management platforms, particularly Venafi, will be given additional consideration.

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