Senior Network Engineer

We are seeking a hands‑on Senior Staff Network Engineer to support and improve the LAN, WAN, wireless, and voice infrastructure across our office, manufacturing, laboratory, and warehouse environments. You will troubleshoot at the packet level, execute production changes and proactively address issues as they arise. You will partner with network architects to implement architecture and design plans.

Analyze packet captures using Wireshark, tcpdump, and SPAN, and correlate them with routing tables, firewall sessions, and logs to find root cause.

Support and troubleshoot LAN, WAN, and wireless networks across multiple sites, including routers, switches, firewalls, and ISP circuits.

Support voice, video, and data services, including VoIP phones and video conferencing equipment.

Prepare production changes for approval with implementation, validation, and rollback steps, then execute them.

Serve as Tier 3 escalation for complex incidents, track down recurring issues without waiting to be assigned.

Perform onsite work such as racking, cabling, optics, and MDF/IDF troubleshooting, and keep diagrams, port records, and incident documentation current.

• Bachelor's degree in a related field or equivalent practical experience plus 8+ years of hands‑on enterprise networking experience.
• Advanced experience troubleshooting LAN and WAN issues in a multi‑site environment, with strong command of TCP/IP, subnetting, DHCP, DNS, NAT, VLANs, and packet forwarding.
• Proven packet level troubleshooting in production, with Wireshark or similar tools.
• Experience supporting voice and data on shared infrastructure, with practical knowledge of VoIP, QoS, voice VLANs, and PoE.
• Hands‑on experience with OSPF, BGP, STP, LACP, and HSRP/VRRP on platforms such as Cisco, Arista, or Aruba.
• Working experience with next generation firewalls (Palo Alto or comparable), security policies, and IPsec VPNs.
• Experience with copper and fiber cabling, optics, console access, and out of band management.
• Experience executing production changes under a formal change and approval process.
• A track record of spotting problems and driving fixes forward with minimal direction.

ZT Systems assesses market data to ensure a competitive compensation package is created for all our employees. The typical base salary for this position is expected to be between $105,000 and $154,000 per year. If hired, the final base salary will be determined on an individual basis taking into consideration experience, skills, knowledge, education and/or certifications. Base salary is just one component of ZT Systems total rewards philosophy.

We take pride in offering a wide range of benefits and perks that appeal to the variety of needs across our diverse employee base. Other rewards may include bonus, paid time off, generous 401k match, tuition reimbursement, wellbeing resources, and more.

We are dedicated to building a diverse, inclusive, and authentic workplace, so if you’re excited about this opportunity but your experience doesn’t align perfectly with every qualification in the job description, you may be just the right candidate for this or other roles.

At ZT Systems, a Sanmina Company, you’ll get to do work you are proud of alongside smart, passionate people. Every day, there are opportunities to collaborate with the best in the industry to design, build, and deliver impactful solutions to world‑class customers. Along the way, you will gain hands‑on experience in a fast‑paced environment that’s challenging, rewarding, and career‑defining. A culture built around our values we work hard and think fast.

We view challenges as opportunities—to do better, push harder, and be faster than we were the day before. When we…