Senior Engineer, Network Infrastructure

Cogeco • Quincy, MA

22h • Hybrid

About The Position

The Senior Network Engineer is responsible for the design, operation, and security of complex wired, wireless, and Internet-facing network infrastructures spanning multiple data centers and locations. The role requires deep expertise across enterprise routing, firewalling, VPNs, DNS, load balancing, security appliances, and large-scale wireless networks.

Requirements

• Bachelor's degree in Computer Science, Information Technology, or a related field.
• 5+ years of experience in network administration or network engineering within enterprise or service-provider environments.
• Hands-on experience administering and supporting FortiGate firewalls, Juniper firewalls, Cisco Layer 2 and Layer 3 switching, Cisco and/or Ruckus wireless networks, and F5 Load Balancers.
• Experience operating enterprise-scale routing, switching, and security infrastructures in complex production environments.
• Proven experience designing, implementing, and supporting IPsec and SSL VPN solutions for site-to-site and remote access connectivity.
• Experience designing scalable, secure, and highly available wired and wireless network infrastructures.
• Demonstrated ability to troubleshoot complex, multi-vendor network issues in mission-critical environments.
• Ability to operate effectively in a fast-moving environment with competing priorities and production impact.
• Willingness to participate in an on-call rotation for after-hours support and incident response.
• Strong understanding and hands-on experience with routing and network protocols including OSPF/OSPFv3, BGP and MP-BGP, Spanning Tree (STP/RSTP/MST), PIM-SSM, IGMP v2/v3, HSRP, VRRP, and MPLS.
• Working knowledge of DNS architectures, including Anycast-based DNS deployments and traffic steering concepts.
• Solid understanding of network and application security principles including DDoS attack types, mitigation strategies, Web Application Firewall (WAF) placement, network segmentation, and Internet-edge security design.
• Familiarity with large-scale wireless design considerations including RF planning, roaming behavior, and high-density environments.
• Understanding of DDoS mitigation technologies and appliances, including inline and out-of-band protection.
• Knowledge of cloud networking concepts, preferably Google Cloud Platform (GCP), with exposure to other major providers such as AWS or Azure.
• Familiarity with ITSM and work management tools such as Jira and ServiceNow.
• Experience creating and maintaining network diagrams and documentation using tools such as Microsoft Visio or Lucidchart.

Responsibilities

• Design, implement, and maintain enterprise network architectures, including LAN, WAN, wireless, data center, and Internet-edge environments.
• Administer, configure, and troubleshoot FortiGate/Juniper SRX firewalls, including policies, NAT, routing, and VPNs.
• Configure, maintain, and support Cisco Layer 2 and Layer 3 switching, including VLANs, spanning tree, EtherChannel, and inter-VLAN routing.
• Deploy, operate, and optimize Cisco and Ruckus wireless networks, including: • Controller-based and cloud-managed WLAN architectures • SSID design, RF tuning, roaming optimization, and wireless security
• Deploy, operate, and support F5 Load Balancers, including LTM (DNS/GTM experience a strong plus).
• Design, implement, and troubleshoot dynamic routing protocols, including BGP and OSPF.
• Design, implement, and support IPsec and SSL VPN solutions for site-to-site and remote access connectivity.
• Operate and troubleshoot DNS services in an Anycast environment.
• Perform advanced network and wireless troubleshooting across complex, multi-vendor environments.
• Participate in network design reviews, infrastructure upgrades, and large-scale migrations.
• Ensure high availability, performance, and security of all network services.
• Maintain accurate network documentation, diagrams, and operational standards.
• Collaborate closely with security, systems, cloud, and application teams to support business and technical objectives.

Benefits

• Flexibility: Yes, we think that what you do matters. At work and at home.
• Fun: We laugh a lot, it makes every day brighter.
• Discounted services: We provide amazing services to our clients, and you’ll get them at home, because you deserve them.
• Rewarding Pay: Let's be honest, everybody likes to make a good salary. We offer attractive compensation packages, and it comes with a great culture.
• Benefits: We’ve got you covered.
• Career Evolution: Join us and we will give you the tools to achieve your career goals!
• Technology: You have a passion for technology? Excellent, we do too. Here, you will manage, influence, play, create, fix, and shape the industry.

What This Job Offers

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