Principal Engineer Technical Support

Principal Technical Support Engineer AI Networking | SONiC | Ethernet Switching Overview Seeking a Principal Technical Support Engineer to lead customer deployments, platform bring-up, and performance optimization for next-generation AI networking infrastructure. This role focuses on high-speed Ethernet fabrics, SONiC-based network operating systems, switch ASICs, and GPU cluster networking. The ideal candidate combines deep technical troubleshooting skills with customer-facing experience and the ability to resolve complex networking challenges across hardware and software. Key Responsibilities Lead bring-up, validation, and performance tuning of AI networking platforms supporting large-scale GPU clusters. Debug and resolve issues spanning SONiC, Linux, networking protocols, switch ASICs, and distributed infrastructure. Develop automation, diagnostic utilities, and telemetry tools to improve deployment efficiency, monitoring, and root-cause analysis. Support customer deployments, proof-of-concept evaluations, integration testing, and production issue resolution. Collaborate with software, hardware, validation, and product engineering teams to improve platform reliability and customer experience. Required Qualifications Bachelor's or Master's degree in Computer Science, Electrical Engineering, or a related discipline. 12+ years of networking, systems software, or technical support engineering experience. Hands-on experience with SONiC or another Network Operating System (NOS) such as Cumulus Linux, Arista EOS, Cisco NX-OS, Juniper Junos, or FBOSS. Strong programming skills in Python, Go, or similar scripting languages. Solid understanding of Linux, TCP/IP, Ethernet switching, routing, VLANs, and network troubleshooting. Experience with network validation tools such as PTF, SPyTest, or comparable testing frameworks. Knowledge of switch ASIC architecture and high-performance networking hardware. Excellent troubleshooting, communication, and customer-facing skills. Preferred Qualifications Experience deploying and tuning Ethernet fabrics for AI, HPC, or large-scale data center environments. Knowledge of RoCEv2, RDMA, ECN, PFC, DCQCN, QoS, buffer management, and congestion control. Experience with 200G/400G/800G Ethernet, PAM4 optics, FEC, PHY technologies, and switch telemetry. Familiarity with EVPN/VXLAN, leaf-spine architectures, GPUDirect RDMA, BlueField DPUs, and AI storage networking. Experience with Prometheus, gNMI, REST APIs, Ansible, Git, and infrastructure automation. Background with performance benchmarking tools such as iPerf3, NCCL Tests, Perftest, or similar networking validation utilities. Estimated Min Rate: $248000.00 Estimated Max Rate: $269000.00 Benefits include: Medical, Prescription, Dental & Vision Benefits (for employees working 20+ hours per week) Health Savings Account (HSA) (for employees working 20+ hours per week) Life & Disability Insurance (for employees working 20+ hours per week) MetLife Voluntary Benefits Employee Assistance Program (EAP) 401K Retirement Savings Plan Direct Deposit & weekly epayroll Referral Bonus Programs Certification and training opportunities Note: Any pay ranges displayed are estimations. Actual pay is determined by an applicant's experience, technical expertise, and other qualifications as listed in the job description. Yoh, a Day & Zimmermann company, is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran. 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