Network Security Engineer Jobs in Missouri (NOW HIRING)

We are seeking a highly skilled and experienced Senior Network Engineer to support and evolve a large enterprise network environment spanning corporate campuses, manufacturing and warehouse facilities, and a primary distribution center, while also contributing to the stability and integration of the global enterprise network.

This role is responsible for the design, implementation, operation, and ongoing optimization of campus and widearea network infrastructure, including multibuilding environments with high availability, operational technology (OT) considerations, and secure segmentation. The position requires deep handson expertise in routing, switching, wireless, firewalls, and network security, as well as the ability to troubleshoot complex issues across geographically distributed sites including cloud infrastructure.

You will work closely with infrastructure, security, and operations teams to ensure reliable connectivity for businesscritical systems, warehouse and logistics platforms, and corporate users, while maintaining alignment with enterprise security standards and network architecture.

This is an excellent opportunity for a senior engineer who enjoys owning realworld networks, supporting physical sites and distribution operations, and contributing to a globally connected enterprise environment.

• Design, implement, and maintain campus network infrastructure across multiple buildings, including core, distribution, and access layers.
• Support network connectivity for a distribution center and warehouse environment, including highavailability requirements and operational technology (IT/OT) segmentation.
• Operate and enhance the enterprise WAN, ensuring reliable and secure connectivity between regional and global locations.
• Develop and maintain network architecture standards and roadmaps aligned with overall infrastructure strategy.
• Implement and manage VLANs, network segmentation, and 802.1X authentication across campus and operational environments.
• Utilize Aruba ClearPass to enforce secure access controls and IT/OT network separation.
• Configure and manage rolebased access control and privileged access using TACACS.
• Administer and troubleshoot sitetosite VPN connectivity and remote site integration.
• Deploy and support SDWAN solutions where appropriate to improve resiliency and performance.
• Perform advanced troubleshooting to isolate and resolve complex network issues across multiple sites and technologies.
• Monitor network performance, availability, and capacity; recommend and implement improvements.
• Implement and manage disaster recovery and backup strategies for core network infrastructure.
• Create and maintain comprehensive technical documentation for campus, WAN, and global network designs.
• Collaborate with security teams to implement and maintain firewall policies and network security controls.
• Participate in network upgrades, lifecycle refreshes, and expansion projects across sites.

Skills and Experience

• 5-10 years of experience supporting large, multisite enterprise networks.
• Strong experience in campus networking, including multibuilding and warehouse/distribution environments.
• Deep knowledge of routing and switching technologies, including BGP and enterprise routing design.Handson experience with Cisco switches and routers.
• Experience with firewall platforms such as Palo Alto, Check Point, or Cisco ASA.
• Strong understanding of network security fundamentals, including segmentation, ACLs, VPNs, and access controls.
• Experience with wireless networking in corporate and operational environments.
• Familiarity with network monitoring and troubleshooting tools.
• Exposure to cloud networking (e.g., hybrid connectivity, cloud interconnects, or virtual networking) is considered a bonus.
• Ability to support oncall rotations and respond to afterhours incidents when required.

Technical Competencies

• Cisco Certified Network Professional (CCNP) preferred.
• HPE Aruba, Palo Alto, Azure AZ-700, or equivalent certification preferred.
• Strong practical experience with enterprise network security and access control solutions.

Leadership Traits

• Excellent communication and interpersonal skills, with the ability to collaborate effectively with teams across the organization.
• Strong analytical and problem-solving skills, with the ability to identify and resolve complex issues.
• Ability to work independently and manage multiple priorities in a fast-paced environment.

Education

• Bachelor's degree in Computer Science, Information Systems, or related field preferred.