Sr. Network Engineer

Littelfuse (NASDAQ: LFUS) is a diversified industrial technology manufacturing company shaping solutions for the safe and efficient transfer of electrical energy. Headquartered in Chicago, Illinois, USA, we serve customers across industrial, transportation, and electronics markets worldwide. With approximately 16,000 employees we design and manufacture innovative technologies that support electrification, energy efficiency, and advanced automation. Our global reach is matched by a culture that empowers innovation and long-term growth. Guided by our principles We Care, We Succeed With Our Customers, and We Own the Outcome, we work collaboratively, think boldly, and deliver solutions that move industries forward.

We are looking for an experienced Senior Network Engineer to join our Global Infrastructure team. This role is responsible for designing, implementing, and supporting a global enterprise network across more than 100 international locations. You will partner with Infrastructure, Cloud, Security, OT, and local IT teams to deliver secure, scalable, and highly available networking solutions.

About Your Job:

• Design, implement, and support global LAN/WAN infrastructure

• Manage enterprise routing, switching and wireless environments
• Deploy and support Palo Alto firewalls, VPNs and network segmentation
• Support cloud networking across Microsoft Azure and AWS
• Design and troubleshoot hybrid connectivity (VPN, ExpressRoute, cloud gateways)
• Support global ISP management, DIA, and SD-WAN connectivity
• Work with Cato Networks SASE and/or Palo Alto Prisma Access/Prisma SD-WAN architectures
• Maintain Cisco Catalyst, Cisco Nexus and Meraki environments
• Implement 802.1X, Cisco ISE, RADIUS and Zero Trust initiatives
• Lead office deployments, migrations and infrastructure refresh projects
• Support OT / Industrial network segmentation where applicable
• Produce technical documentation and network diagrams
• Mentor junior engineers and participate in technical leadership

Required Technical Skills

Enterprise Networking
- Cisco Catalyst
- Cisco Nexus
- VLANs, STP, EtherChannel
- HSRP / VRRP
- BGP, OSPF, Static Routing

Security
- Palo Alto Firewalls
- IPSec VPN
- SSL VPN
- NAT
- ACLs
- Network Segmentation
- Zero Trust

SASE / SD-WAN
- Cato Networks
- Palo Alto Prisma Access
- Palo Alto Prisma SD-WAN
- SD-WAN architecture
- Secure Internet Access

Wireless
- Cisco Wireless
- Meraki Wireless
- 802.1X
- Guest Access
- Roaming optimization

Cloud
- Microsoft Azure Networking
- Azure Virtual WAN
- Azure VPN Gateway
- ExpressRoute
- AWS Networking

Authentication
- Microsoft Entra ID
- Active Directory
- Cisco ISE
- RADIUS
- Certificate-based authentication

Monitoring & Automation
- SolarWinds
- LogicMonitor (preferred)
- ThousandEyes
- Python (preferred)
- PowerShell (preferred)
- REST APIs (preferred)

Preferred Certifications

• CCNP Enterprise
• PCNSE
• Microsoft Certified: Azure Network Engineer Associate
• CCIE Enterprise (preferred, not required)

What Success Looks Like

• Improve global network stability and availability
• Deliver infrastructure modernization projects
• Standardize global network architecture
• Strengthen cloud connectivity and security
• Reduce operational complexity through automation
• Collaborate effectively across Infrastructure, Security and Cloud teams.

About You:

At Littelfuse, we support employee growth and development. Guided by our culture principles, our teams work together to deliver value for customers and make a positive impact in the communities where we operate. We are an equal opportunity employer committed to fostering an inclusive workplace where everyone has the opportunity to grow and contribute. We offer competitive compensation and benefits, performance-based incentives, flexible work arrangements, and development opportunities.