Senior Network Engineer - Infrastructure & Project Delivery

Job Description

Senior Network Engineer – Infrastructure & Project Delivery

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Location: Bethpage, NY (Long Island)

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Work Arrangement: 100% Onsite – 5 days per week

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Employment Type: 6-Month Contract with Potential for Extension or Conversion

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Schedule: Standard business hours with required after-hours and occasional weekend work

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Position Overview

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We are partnering with a leading organization in Bethpage, NY, seeking an experienced, highly hands-on Senior Network Engineer to support enterprise network infrastructure initiatives across campus, data center, and IT/OT environments.

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This position requires an engineer who can independently own network projects from start to finish , including requirements gathering, solution design, implementation, testing, troubleshooting, and documentation.

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The ideal candidate combines advanced Cisco routing and switching expertise with strong firewall administration, BGP traffic engineering, data center networking, and physical infrastructure experience.

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This is not a position focused solely on network monitoring, operational support, or high-level architecture. We need someone comfortable developing a technical approach, making decisions, coordinating resources, and personally executing the work.

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The engineer will work across multiple infrastructure projects and must be comfortable operating independently with minimal supervision.

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Key Responsibilities

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End-to-End Network Project Delivery

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• Independently manage assigned network infrastructure projects from requirements gathering through implementation and completion.
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• Evaluate existing network designs, recommend improvements, and develop technical solutions based on business and operational requirements.
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• Perform hands-on configuration, deployment, testing, troubleshooting, and validation of network infrastructure.
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• Coordinate with internal teams, vendors, telecommunications providers, and project stakeholders.
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• Manage network migrations, upgrades, maintenance activities, and production changes.
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• Maintain accurate network diagrams, configuration documentation, and implementation procedures.
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Cisco Routing, Switching & Advanced Networking

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• Configure, administer, and troubleshoot enterprise Cisco routing and switching infrastructure.
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• Support advanced routing protocols, including BGP, OSPF, and related Layer 2/Layer 3 technologies.
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• Perform BGP traffic engineering , including inbound and outbound traffic optimization across multiple ISP or partner connections.
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• Demonstrate practical knowledge of BGP attributes and routing policies, including AS-path prepending, MED, communities, and local preference.
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• Configure and troubleshoot spanning tree technologies, including BPDU Guard, Root Guard, and related network protection mechanisms.
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• Support network resiliency, redundancy, failover, and performance optimization.
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Firewall Administration & Network Security

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• Perform hands-on firewall administration across enterprise security platforms such as Palo Alto, Cisco ASA/Firepower, or Check Point.
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• Create, modify, troubleshoot, and validate firewall security rules, access policies, and ACLs.
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• Configure and troubleshoot site-to-site IPsec VPN connections with external partners and remote locations.
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• Perform firewall upgrades, migrations, and security infrastructure changes.
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• Troubleshoot network connectivity and security issues across multiple layers of the network.
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Data Center & Enterprise Infrastructure

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• Configure and support Cisco Nexus switching infrastructure in enterprise data center environments.
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• Troubleshoot Nexus vPC configurations, including peer links, keepalive connections, and redundancy.
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• Support modern data center networking technologies such as Cisco ACI and VXLAN.
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• Participate in campus network, data center, and IT/OT infrastructure deployments.
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• Support Cisco ISE and network access control technologies, including endpoint profiling, policy enforcement, and TrustSec where applicable.
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Physical Infrastructure & Connectivity

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• Perform hands-on network equipment installation, rack-and-stack activities, and physical connectivity troubleshooting.
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• Support structured cabling requirements, cabling design, and installation coordination.
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• Work directly with telecommunications providers to order, provision, test, and turn up network circuits.
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• Coordinate hardware installations, equipment replacements, and infrastructure upgrades.
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• Troubleshoot issues across Layers 1 through 4, including physical connectivity, switching, routing, and transport protocols.
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Additional Network Technologies

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Depending on project requirements, the engineer may also support:

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• SD-WAN and SASE technologies
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• Cisco DNA Center and Software-Defined Access (SD-Access)
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• F5 load balancing technologies
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• Enterprise wireless infrastructure
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• Cisco VoIP and video conferencing environments
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• Network automation and infrastructure modernization initiatives
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Required Qualifications

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• Extensive hands-on experience supporting complex enterprise network environments, preferably in a senior-level engineering capacity.
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• Demonstrated ability to independently deliver network infrastructure projects with limited oversight.
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• Advanced experience configuring and troubleshooting Cisco routers and switches, including Catalyst and Nexus platforms.
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• Strong knowledge of BGP, OSPF, spanning tree, VLANs, and enterprise routing and switching technologies.
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• Practical experience with BGP traffic engineering, including influencing inbound traffic across multiple connections.
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• Strong, direct firewall administration experience , including firewall rule changes, site-to-site VPN configuration, troubleshooting, and upgrades.
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• Experience with enterprise firewall platforms such as Palo Alto, Cisco ASA/Firepower, or Check Point.
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• Hands-on data center networking experience, including Cisco Nexus and vPC.
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• Experience supporting physical network infrastructure, including cabling, equipment installations, and circuit provisioning.
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• Strong troubleshooting skills across Layers 1–4.
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• Ability to coordinate vendors, communicate technical requirements, and execute changes in production environments.
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• Strong documentation, communication, problem-solving, and organizational skills.
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• Ability to work onsite in Bethpage, NY, five days per week and support after-hours or weekend implementations when required.
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Preferred Qualifications

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• Cisco ACI and VXLAN experience.
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• Cisco ISE, network access control, endpoint profiling, or TrustSec experience.
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• SD-WAN, SASE, Cisco DNA Center, or SD-Access experience.
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• F5 load balancing experience.
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• Enterprise wireless, VoIP, and video infrastructure experience.
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• Experience supporting IT/OT environments.
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• Relevant Cisco certifications, such as CCNP or CCIE.
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Ideal Candidate Profile

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The ideal candidate is a senior-level network engineer who is equally comfortable designing a solution and physically implementing it.

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They can walk into an unfamiliar environment, gather requirements, evaluate the existing infrastructure, determine the appropriate technical approach, and successfully execute the project without constant direction.

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They have substantial hands-on experience with Cisco routing and switching, advanced BGP, firewall administration, VPNs, and data center technologies.

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They are also willing to perform the practical work necessary to complete a project, whether that involves configuring a firewall, troubleshooting a BGP routing issue, installing equipment, coordinating a circuit turn-up, or working after hours to complete a migration.

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This is a hands-on engineering position requiring technical depth, independent decision-making, and end-to-end project ownership.