L3 Network Engineer

Job Title : L3 Network Engineer
Location : Dallas, TX 75235

Duration : 12+ months (with possible extension)

No H1B.

Sr Level - L3 Network Engineer







Job description:

We're looking for engineers with hands-on operational experience in large Cisco enterprise environments who can contribute with minimal ramp-up time.

Our current environment includes:

• Cisco Software-Defined Access (SDA)
• Cisco Catalyst Center (DNA Center)
• Cisco Identity Services Engine (ISE)
• Cisco Catalyst 9800 Wireless Controllers
• Cisco Catalyst 9130/916x Access Points
• High-density enterprise and healthcare wireless
• Cisco Nexus data center technologies, including VXLAN/EVPN and Nexus Dashboard (NDFC)
• Cisco routing and switching
• Cisco Secure Firewall technologies
• Azure connectivity (ExpressRoute) and hybrid networking
• ServiceNow change, incident, and operational workflows

From an experience perspective, we're looking for candidates who can demonstrate real-world operational ownership-not just exposure. Strong candidates should be comfortable discussing topics such as:

• Troubleshooting Cisco SDA fabrics and Catalyst Center
• Cisco ISE authentication, authorization, profiling, and endpoint onboarding
• Enterprise wireless troubleshooting, RF optimization, roaming, and client performance
• Routing protocols including BGP, OSPF, and EIGRP
• Data center networking using VXLAN/EVPN
• Large-scale Cisco switching and routing
• Incident response and root cause analysis in a production environment
• Working in a 24x7 operational support model with on-call responsibilities

Candidates whose experience is primarily limited to traditional routing and switching, data center deployments, or configuration work-without hands-on experience supporting SDA, Catalyst Center, ISE, and enterprise wireless-typically are not the right fit for this role.

Healthcare experience is certainly a plus, but it isn't required. What's most important is experience supporting large, always-on Cisco enterprise environments where uptime, operational excellence, and troubleshooting are critical.

Donato Technologies Inc. is a trusted IT staffing, consulting, and software development partner headquartered in Dallas, Texas. We support clients across industries by understanding their unique business needs and delivering tailored technology and workforce solutions. Our focus is on connecting the right talent with the right opportunity-ensuring clients receive dependable, skilled professionals and candidates receive meaningful career growth and support. We work closely with small to mid-sized organizations to provide flexible, high-quality services that drive performance, innovation, and long-term success.