Sr. Principal Network Engineer

Fresenius Medical Care • Waltham, MA

3d

About The Position

Determines network strategies and competence by planning delivery of solutions; answering technical and procedural questions for less experienced team members; teaching improved processes; mentoring team members. Determines network requirements by evaluating business strategies and requirements; researching information network standards; conducting system network and vulnerability analyses and risk assessments; studying architecture/platform; identifying integration issues; preparing cost estimates. Plans network systems by evaluating network and network technologies; developing requirements for local area networks (LANs), wide area networks (WANs), virtual private networks (VPNs), routers, load balancers. Wireless LANS, and related network and network devices; designs IP Address Management infrastructures (IPAMs), including use of DHCP and DNS that adhere to industry standards.

Requirements

• Minimum of 12 years' related experience of which at least 8 years should be in a network role
• Deep expertise in routing and switching (BGP, OSPF, IS‑IS, EVPN/VXLAN)
• Strong experience with data center and WAN architectures (MPLS, SD‑WAN)
• Advanced knowledge of network security concepts (firewalls, segmentation, zero trust, SASE)
• Experience with cloud networking (AWS, Azure, or GCP): VPC/VNet design, hybrid connectivity
• Hands‑on experience with monitoring, telemetry, and performance optimization
• Expert working level with switches, routers, wireless LANs, load balancing, DNS

Nice To Haves

• Bachelor's Degree preferred
• Advanced Degree preferred
• A degree in Computer Science or MIS a plus
• MIS or Computer Science course work at the graduate level a plus
• Certification in a Network role (e.g. CCNA) is highly desirable

Responsibilities

• Design, implement, and support end‑to‑end network architecture across data center, cloud, campus, and WAN environments
• Assist in establishing reference architectures, design standards, and guardrails used across the organization
• Ensure network designs align with business strategy, application needs, security posture, and scalability goals
• Evaluate emerging technologies, platforms, and vendors; influence investment and platform selection decisions
• Provide hands‑on expertise during major incidents, architectural failures, or executive‑visible outages
• Lead deep technical investigations involving performance, resilience, or security failures
• Ensure network architectures meet availability, resiliency, compliance, and security requirements
• Identify systemic risks and drive preventative architectural improvements

Benefits

• medical, dental, and vision insurance
• a 401(k) with company match
• paid time off
• parental leave

What This Job Offers

• Job Type: Full-time
• Career Level: Principal