Senior Network Engineer: Design & Secure Enterprise Network

Ventures Unlimited Inc; St. Louis (MO); On-site; USD 90,000 - 120,000; Full time

Job summary

Ventures Unlimited Inc is seeking an experienced IT Network Engineer 3 to design, implement, and support its enterprise network across LAN, WAN, and WLAN. You will translate business needs into scalable, secure network solutions and lead changes with minimal disruption.

You will troubleshoot complex connectivity issues, perform root-cause analyses, and collaborate with architects, cybersecurity, application teams, and vendors.

Qualifications

• 5+ years of related experience in designing, implementing, supporting, and improving enterprise network infrastructure.
• Strong knowledge of TCP/IP, IPv4/IPv6, DNS, DHCP, VLANs, STP, NAT, ACLs, and subnetting.
• Hands-on expertise with enterprise routing and switching, including BGP and OSPF.
• Experience supporting LAN, WAN, WLAN and complex production network environments.
• Working knowledge of firewalls, VPNs, network segmentation, access controls, and security principles.
• Strong troubleshooting using packet analysis, logs, monitoring platforms, and diagnostic tools.
• Experience with network monitoring, capacity management, performance management, availability management, and root-cause analysis.
• Ability to create/maintain network diagrams, implementation plans, standards, procedures, configuration records, troubleshooting guides.
• Experience supporting complex infrastructure projects, production changes, and service-impacting incidents.
• Exposure to network automation or scripting using Python, PowerShell, or Ansible is preferred.
• Relevant certifications such as Cisco CCNP, CCNA desirable.
• Strong written and verbal communication to explain risks and status.

Responsibilities

• Design, configure, implement, and enhance enterprise LAN, WAN, WLAN, routing, switching, and associated network infrastructure.
• Translate business and technical requirements into scalable, secure, resilient network solutions.
• Lead implementation, maintenance, troubleshooting, and continuous improvement of enterprise network services.
• Diagnose and resolve complex connectivity, availability, performance, and configuration issues.
• Monitor network health, capacity, availability, and performance and recommend preventive or corrective improvements.
• Provide advanced support for network incidents and service-impacting events and participate in root-cause analysis.
• Plan and execute network changes while minimizing operational risk and service disruption.
• Incorporate security and compliance requirements into network engineering and operational activities.
• Develop and maintain network diagrams, standards, implementation procedures, operating guides, and technical documentation.
• Provide network expertise to infrastructure and technology projects and contribute to complex transformation initiatives.
• Collaborate with architects, cybersecurity, application teams, telecommunications providers, customers, and technology vendors.
• Act as a subject-matter expert across multiple network technologies and guide junior engineers on complex assignments.

Skills

TCP/IP

IPv4/IPv6

Routing & Switching

BGP/OSPF

LAN/WAN/WLAN

Network Security

Troubleshooting

Monitoring

Documentation

Change Management

Network Diagrams

Scripting

Communication

Education

Cisco CCNP

Cisco CCNA

Certifications desirable

Tools

Packet Analyzers

Monitoring Platforms

Ansible

PowerShell

Python

Job description

Ventures Unlimited Inc is seeking an experienced IT Network Engineer 3 to design, implement, and support its enterprise network across LAN, WAN, and WLAN. You will translate business needs into scalable, secure network solutions and lead changes with minimal disruption.

You will troubleshoot complex connectivity issues, perform root-cause analyses, and collaborate with architects, cybersecurity, application teams, and vendors.