Senior Network Engineer — Multi-Site, Hands-On

ZT Group Intl; Georgetown (TX); On-site; USD 105,000 - 154,000; Full time

Benefits offered by this job

Bonus

Paid time off

401k match

Tuition reimbursement

Wellbeing resources

Job summary

ZT Systems, a Sanmina Company, is seeking a hands-on Senior Staff Network Engineer to support LAN/WAN, wireless, and voice infrastructure across our office, manufacturing, laboratory, and warehouse environments. You will troubleshoot at the packet level, prepare production changes, and serve as Tier 3 escalation.

Ideal candidates have 8+ years of hands-on enterprise networking experience, strong TCP/IP skills, and experience with OSPF/BGP on Cisco/Arista/Aruba platforms, plus firewall/IPsec

Qualifications

• 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.

Responsibilities

• 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.

Skills

TCP/IP

Subnetting

DHCP

DNS

NAT

VLANs

Packet Forwarding

VoIP

QoS

OSPF

BGP

HSRP/VRRP

Cisco

Arista

Aruba

Palo Alto

Wireshark

tcpdump

Education

Bachelor's degree or equivalent

Tools

Cisco

Arista

Aruba

Palo Alto

Wireshark

tcpdump

Job description

ZT Systems, a Sanmina Company, is seeking a hands-on Senior Staff Network Engineer to support LAN/WAN, wireless, and voice infrastructure across our office, manufacturing, laboratory, and warehouse environments. You will troubleshoot at the packet level, prepare production changes, and serve as Tier 3 escalation.

Ideal candidates have 8+ years of hands-on enterprise networking experience, strong TCP/IP skills, and experience with OSPF/BGP on Cisco/Arista/Aruba platforms, plus firewall/IPsec