Senior Network Engineer

Title: Sr. Network Engineer Location: Cambridge, MA (Onsite) Hire Type: Contract Year of experience – 15 years Location - 675 W Kendall St, Cambridge, MA 02142 Job Description: Experience in Meraki, Infoblox, Cisco Enterprise Routers, Switches, ASA’s, FTD’s is a must Network SME A Senior Network Engineer to lead the stability, performance, and evolution of enterprise network. Own day to day operations, design and deliver minor projects and enhancements, and act as a key decision maker ongoing issues, standards, and incident response priorities. This role blends hands-on engineering with leadership teams to meet uptime, performance and scalability goals. Ensure availability and performance across LAN/WAN, WLAN, SD WAN, data center, and cloud interconnects; proactively remediate alerts and capacity issues. Lead major incident, drive root cause analysis (RCA), implement corrective/preventive actions, and maintain post incident documentation. Author change plans, execute network changes during maintenance windows, and adhere to ITIL processes and risk controls. Establish post-migration validation protocols and rollback prevention to ensure successful transitions and minimize operational risk. Maintain standardized configurations and golden templates; enforce baseline compliance and secure device hardening. Administer network ACLs, firewalls, VPNs, segmentation, and NAC (e.g., 802.1X), coordinating closely with Security/IR teams. Develop and tune dashboards, SNMP/NetFlow/sFlow, device telemetry, and syslog for actionable insights; maintain runbooks. Manage TAC/service escalations, RMA, firmware/OS lifecycle, and bug impact assessments. Scope, design, and deliver small to medium network projects (e.g., site cutovers, Wi Fi refreshes, routing redesigns, micro segmentation, SD WAN policy tuning). Publish L2/L3/WLAN standards, address/route plans, QoS models, and security patterns; maintain HLD/LLD documentation. Design VPC/VNet topologies, hybrid connectivity (VPN/Direct Connect/ExpressRoute), routing and security policies across cloud/on prem. Implement network automation (e.g., Meraki APIs) to reduce toil and enforce compliance at scale. Benchmark, capacity plan, and optimize QoS, multicast, load balancing, and application delivery paths. Build lab tests, pilots, and staged rollouts; define success criteria and rollback plans. Evaluate and select platforms, tooling, and designs based on business needs, risk, and total cost of ownership. Make real time tradeoffs during incidents and maintenance windows; decide sequencing, rollback thresholds Enforce standards, review changes, approve exceptions, and mentor engineers on best practices. Partner with Security, Cloud, Systems, and PMO to align roadmaps and deliver outcomes on time and within budget. Experience in Meraki, Infoblox, Cisco Enterprise Routers, Switches, ASA’s, FTD’s is a must 7-Signal / Mobile Eye would be excellent LogicMonitor would be good but not a requirement Job Type: Contract Pay: $55.00 - $65.00 per hour Work Location: In person