Senior Network Infrastructure Engineer - SNIE 25-26996

Overview

On Site
Depends on Experience
Accepts corp to corp applications
Contract - Independent
Contract - W2
No Travel Required

Skills

WAN
Wireshark
Tcpdump
Technical Writing
VMware
Virtual Private Cloud
Virtual Private Network
Root Cause Analysis
Routers
Routing Protocols
SIEM
SLA
NetScout
Network
Network Administration
Network Design
Network Optimization
GRE
Google Tag Manager (GTM)
IPsec
IQ
Inspection
Issue Resolution
Cisco PIX
Cloud Computing
Collaboration
Communication
Standard Operating Procedure
OSPF
Microsoft Azure
Microsoft Visio
Network Protocols
Network Security
Optimization
QoS
Spanning Tree Protocol
Splunk
Switches
TCP/IP
F5
Firewall
Load Balancing
Management
Meraki
Microsoft
Nexus
Computer Networking
Data Centers
Documentation
EIGRP
Enterprise Networks
ASA
Amazon Web Services
Border Gateway Protocol
Cisco
Cisco Certifications

Job Details

Job Title: Senior Network Infrastructure Engineer
Location: Brooklyn, NY (Onsite/Hybrid as required)
Duration: 2 Years
Interview Mode: Microsoft Teams

Position Summary:

A large-scale IT program is seeking a highly experienced Senior Network Infrastructure Engineer to support and modernize enterprise networking environments including hybrid cloud data centers, WAN networks, and critical application infrastructure. This role involves design, implementation, and support of a range of networking technologies including Cisco routers, switches, firewalls, load balancers, and cloud networking.

The engineer will play a key role in infrastructure upgrades, network optimization, and operational support especially within projects like campus network refreshes, data center modernization, and application delivery optimization.

Key Responsibilities:

  • Lead daily network administration and support: equipment configuration, installation, upgrades, and troubleshooting.

  • Configure and support Cisco technologies: Nexus, ASR, Catalyst, ACI, SDWAN.

  • Support and troubleshoot Cisco ASA/FirePOWER (FMC/FTD/FXOS) firewalls and VPNs (AnyConnect, IPSec, GRE, IKEv2).

  • Design and configure advanced network protocols and technologies: BGP, EIGRP, OSPF, VXLAN, VPC, QoS, STP, ACLs, TCP/IP.

  • Collaborate with application and infrastructure teams on F5 and NSX/Avi load balancer configuration.

  • Use diagnostic tools like Wireshark, tcpdump, and Netscout for deep packet inspection and root cause analysis.

  • Provide operational support: issue resolution, root cause analysis, and preventative solutions.

  • Manage Azure and AWS cloud network configurations and firewall rules.

  • Work with vendors to ensure timely resolution of outages and incidents within SLA targets.

  • Maintain and develop network diagrams, standard operating procedures, and technical documentation (Visio, Lucidchart).

  • Monitor and implement security best practices for enterprise and cloud-based network environments.

Required Qualifications:

  • 8+ years hands-on experience with Cisco routers and switches (Nexus, Catalyst, ASR, ACI, etc.)

  • 8+ years with routing protocols (BGP, OSPF, EIGRP)

  • 5+ years working with network security tools (Cisco ASA, FirePOWER)

  • 5+ years experience configuring and supporting F5 (LTM, GTM, BIG-IQ)

  • 5+ years experience conducting packet-level network analysis

Preferred Qualifications:

  • Experience in K-12 or education-related projects

  • Cisco CCNP, VMware certifications

  • Familiarity with SDWAN, Meraki, vManage

  • Experience in VMware NSX/NSX ALB

  • Hands-on experience with Splunk SIEM/SPL

  • Exposure to Azure and AWS infrastructure, ExpressRoute

  • Process-driven mindset with strong documentation skills

  • Excellent communication skills with the ability to explain technical issues to non-technical stakeholders

Employers have access to artificial intelligence language tools (“AI”) that help generate and enhance job descriptions and AI may have been used to create this description. The position description has been reviewed for accuracy and Dice believes it to correctly reflect the job opportunity.