Senior Network Engineer (C-561)

SMASH, Who we are?

We believe in long-lasting relationships with our talent. We invest time getting to know them and understanding what they seek as their professional next step.

We aim to find the perfect match. As agents, we pair our talent with our US clients, not only by their technical skills but as a cultural fit. Our core competency is to find the right talent fast.

This role is available to candidates located within the United States. Applicants must be U.S. citizens or hold a valid U.S. work authorization to be considered. 

Role summary
You will design, implement, and support enterprise network infrastructures across multiple customer environments, ensuring high availability, performance, and security. This role combines deep technical expertise with customer-facing responsibilities to deliver reliable networking solutions and proactive support.

Responsibilities

• Support and manage customer network environments, ensuring reliability and performance.
• Maintain and troubleshoot network infrastructure including routers, switches, firewalls, load balancers, and wireless systems.
• Design and optimize routing topologies (SD-WAN, BGP, EIGRP, OSPF, VRFs).
• Design and manage switching environments (VLANs, trunking, EtherChannels, Spanning Tree, DHCP Snooping, ARP inspection).
• Provide incident response, firewall and VPN administration, and troubleshooting.
• Perform proactive monitoring, capacity planning, and performance optimization.
• Conduct security monitoring and implement network security best practices.
• Create and maintain network documentation and topology diagrams.
• Collaborate with internal teams to improve processes and deliver solutions.
• Manage tasks and incidents through ticketing systems.
• Stay current with emerging networking technologies and best practices.

Requirements – Must-haves

• 10+ years of experience implementing and supporting enterprise network infrastructure.
• Strong expertise in routing and switching technologies across Cisco, Aruba, Arista, and similar platforms.
• Advanced experience with firewalls (Cisco, Palo Alto, Fortinet).
• Strong knowledge of wireless networking (controllers, access points, enterprise WiFi).
• Experience with load balancing technologies (e.g., F5).
• Deep understanding of networking protocols (TCP/IP, DNS, DHCP, SSL/TLS, HTTP, SMTP, LDAP, etc.).
• Experience supporting enterprise environments with fiber and wireless technologies.
• Ability to design, document, and explain network architectures to technical and non-technical stakeholders.
• Strong troubleshooting and incident response skills under time constraints.
• Experience working with ticketing systems and customer support environments.
• CCNP/CCIE certification or equivalent experience.

Nice-to-haves (optional)

• Experience with SD-WAN implementations.
• Experience in managed service provider (MSP) environments.
• Additional certifications in Cisco, Palo Alto, Aruba, or Arista technologies.
• Experience optimizing large-scale enterprise or campus networks.