Network Engineer - (LAN/WLAN - Cisco Enterprise)

3DS Dassault Systems-posted 2 months ago
Broomfield, CO
5,001-10,000 employees
Professional, Scientific, and Technical Services
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We're seeking a Network Engineer with deep expertise in Cisco enterprise LAN and WLAN technologies to support a distributed campus and branch network environment. This role demands a balance of architectural thinking and hands-on execution - someone who can design with foresight, configure with precision, and troubleshoot under pressure. You'll be responsible for maintaining and evolving a multi-site Cisco network built on high-availability, security, and scalability principles. The right engineer has seen networks break, learned from it, and knows how to build them better.

  • Design, implement, and support Cisco LAN/WLAN infrastructure across campus and branch offices - including Catalyst switching, ISR/ASR routing, and Catalyst/Aironet/Meraki wireless solutions.
  • Perform RF design and wireless site surveys (Ekahau or similar), ensuring optimal WLAN coverage and performance.
  • Maintain and optimize Cisco DNA Center, ISE, and WLCs for centralized management and visibility.
  • Conduct capacity planning, performance tuning, and QoS optimization for real-time, and data services.
  • Implement and maintain network segmentation, access control, endpoint profiling and security policies in coordination with cybersecurity teams.
  • Implement security protocols and ensure compliance with industry standards (e.g., WPA3, 802.1X).
  • Manage redundant WAN and SD-WAN links, ensuring optimal failover and traffic routing across sites.
  • Lead network refresh, expansion, and migration projects, from design to deployment.
  • Assist in capacity planning and future-proofing wireless infrastructure for scalability and emerging technologies (e.g., WiFi 6/6E/7, IoT).
  • Troubleshoot complex issues across Layer 1-7, providing deep-dive analysis and long-term remediation.
  • Develop and maintain accurate network documentation - diagrams, configurations, and operational procedures.
  • Participate in on-call rotation and provide Tier 2/3 support for escalated network issues.
  • Research, test, and recommend new LAN/WLAN technologies, network automation, and monitoring improvements.
  • 5 + years of experience supporting enterprise Cisco networks (campus and branch).
  • Expert-level understanding of Cisco LAN technologies: VLANs, STP, EtherChannel, VTP, QoS, 802.1X, DHCP snooping, IP helper, etc.
  • Strong knowledge of Cisco routing protocols: OSPF, EIGRP, and BGP; VRF and VXLAN experience a plus.
  • Proficiency with WLAN standards (802.11a/b/g/n/ac/ax), wireless security (WPA2/3, 802.1X), and RF troubleshooting.
  • Hands-on experience with Cisco DNA Center, ISE, and WLC platforms.
  • Familiarity with Cisco Meraki cloud-managed networking is advantageous.
  • Understanding of network automation and scripting (Python, Ansible, or REST APIs).
  • Experience integrating with Cisco Secure Access (ISE/NAC) and implementing zero-trust principles.
  • Skilled with network monitoring and visibility tools such as SolarWinds, NetFlow, or Cisco ThousandEyes.
  • Excellent communication and documentation skills; able to translate technical insight into clear action.
  • CCNP Enterprise or higher (e.g., CCIE Enterprise Infrastructure a strong plus)
  • CWNA / CWDP or equivalent WLAN certification
  • Cisco Certified Specialist in Enterprise Design or Wireless Implementation
  • Experience with Cisco DNA Center, and ISE.
  • Exposure to cloud networking (Azure, AWS) and SD-WAN technologies.
  • ITIL Foundation or similar process certification a plus
  • Knowledge of network automation tools (Python, Ansible) is a plus.
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