Senior Network Engineer

Job Summary:
The Senior Network Engineer will design, implement, and optimize a large-scale enterprise network supporting over locations. This position plays a key role in maintaining network reliability, scalability, and security across a complex multi-cloud environment. The engineer will manage MPLS, DIA, PP circuits, AWS Direct Connect, Azure ExpressRoute, and implement advanced routing, VPN, and automation solutions that ensure high performance and visibility throughout the network ecosystem. Key Responsibilities:

• Architect, deploy, and maintain a scalable, secure enterprise network across + sites.
• Design and manage MPLS, DIA, PP, Cloud Connects, AWS Direct Connect, and Azure ExpressRoute connectivity.
• Configure and support IPSec VPN tunnels for secure communication and remote access.
• Implement advanced routing with BGP, EIGRP, OSPF, static routes, ACLs, and route maps.
• Administer Cisco routers (ISR, ASR) and switches (Catalyst, Nexus).
• Oversee enterprise wireless networks using Cisco WLCs and Access Points.
• Manage Infoblox DDI (DNS, DHCP, IPAM) for high-availability name services.
• Maintain Cisco Client (, NAC) for access control and authentication.
• Drive network automation, proactive monitoring, and incident response using SNMP-based tools and ExtraHop analytics.
• Develop and enforce security and segmentation policies to maintain compliance and resiliency.

Required Experience:

• – years of hands-on experience in network engineering, design, and operations.
• Expertise in MPLS, DIA, PP, AWS Direct Connect, and Azure ExpressRoute.
• Deep knowledge of routing protocols (BGP, EIGRP, OSPF) and VPN technologies.
• Extensive experience with Cisco routers/switches and enterprise wireless infrastructure.
• Strong proficiency with SNMP-based monitoring tools (SolarWinds, PRTG, ThousandEyes, Cisco DNA Center).
• Hands-on experience with ExtraHop for traffic analytics and performance troubleshooting.
• Experience with Infoblox DDI and Cisco NAC/ authentication systems.

Nice-to-Have Experience:

• Network automation via Python, Ansible, or API-based frameworks.
• Familiarity with SD-WAN and Zero Trust implementations.
• Cloud network design and hybrid connectivity experience.

Required Skills:

• Advanced network design and routing configuration
• Cloud and MPLS connectivity management
• Network monitoring and automation

Preferred Skills:

• Cisco infrastructure and security policy management
• Infoblox and DDI administration
• Deep packet inspection and analytics

Additional Skills:

• Network automation and performance optimization
• SNMP monitoring and visibility tools
• Wireless and access policy configuration

Benefits:

• Medical, Vision, and Dental Insurance Plans
• k Retirement Fund

About the Client:
Our client is a leading sustainable energy company with a footprint in states and more than $ billion in assets. Serving million electric and natural gas customers across the Northeast, they maintain a diverse renewable energy portfolio and are a recognized leader in the offshore wind industry. Named one of the World’s Most Ethical Companies for three consecutive years, the company is committed to ethical business practices and invests in charitable organizations supporting the communities they serve.
About GTT:
GTT is a minority-owned staffing firm and a subsidiary of Chenega Corporation, a Native American-owned company in Alaska. As a Native American-owned, economically disadvantaged corporation, we highly value diverse and inclusive workplaces. Our clients include Fortune companies across technology, energy, and life sciences industries throughout the and Canada. Job Number: - LI-GTT LI-Onsite