About The Role 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. What You Will Do 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. What You Bring 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, we encourage you to apply anyway. You may be just the right candidate for this or other roles. #LI:SL1 #LI:Onsite About ZT Systems 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 fail, we learn from it and move on together. And when we succeed, we use the momentum to go even further. We create value with everything we do, building the foundation of today—and transforming the future of tomorrow. Join ZT Systems and help us build technology infrastructure that connects the world. About ZT Systems 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 fail, we learn from it and move on together. And when we succeed, we use the momentum to go even further. We create value with everything we do, building the foundation of today—and transforming the future of tomorrow. Join ZT Systems and help us build technology infrastructure that connects the world. What We Offer At ZT Systems, a Sanmina Company, we believe that investing in our people is key to our continued growth and innovation. When you join our team, you’ll gain access to a comprehensive and inclusive benefits package designed to support your well-being, financial security, and professional development—both now and in the future. Compensation & Financial Security -Competitive base salary -Performance-based annual bonus eligibility -401(k) retirement savings plan -Tuition reimbursement for eligible education programs Health & Wellness -Comprehensive medical, dental, and vision coverage with access to leading providers -Mental health resources and employee wellness support programs- -Company-paid life and disability insurance Time Away & Work-Life Balance -Paid time off (PTO) and company-paid holidays -Parental leave and family care support programs Growth & Purpose -Structured training programs and on-the-job learning opportunities -Matching gifts and volunteer programs to support causes you care about These benefits are available to eligible employees and are designed to grow with you as your career evolves. Full benefits and eligibility varies by work location. Learn more about our benefits here. ZT Group Int’l. is an Equal Opportunity Employer and prohibits discrimination and harassment of any kind. ZT Systems provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws. Please be aware that certain positions may require the applicant to either 1) be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or 2) be eligible to obtain an export control license or license exception from the Bureau of Industry and Science & U.S. Department of Commerce. All offers of employment will be conditional subject to the foregoing. ZT Systems, a Sanmina Company is a place where you can do work you’re proud of alongside smart, passionate people who get genuinely excited about what they’re able to accomplish here. We work, learn, and grow together in a supportive and fast-moving environment where decisiveness and action are not only encouraged, but expected. Together, we’re tackling complex challenges and creating impactful solutions in one of the world’s most high-demand industries—that’s where you come in. Learn more at www.ztsystems.com If you are a current ZT Systems employee interested in applying for an internal job, please use this link below: CURRENT EMPLOYEES APPLY HERE By submitting your information and application, you confirm that you agree to the applicant privacy policy linked here: https://ztsystems.com/applicant-privacy-policy/

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