Wireless System Validation Engineer Job at SGS Consulting, California

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  • SGS Consulting
  • California

Job Description

Job Responsibilities:

  • Test Strategy & Execution: Define, develop, and execute comprehensive test plans for cellular modem validation across various radio access technologies (5G NR FR1/FR2, LTE-A, UMTS).
  • Protocol Stack Analysis: Perform deep-dive log analysis of the cellular protocol stack (L1, MAC, RLC, RRC, and NAS layers) to identify and root-cause signaling failures, handovers, and throughput drops.
  • System Performance Benchmarking: Characterize key performance indicators (KPIs) such as RSRP, SINR, BLER, and Peak Throughput under varying network conditions (fading, interference, and mobility).
  • Test Automation: Design and maintain scalable automation frameworks using Python to increase test coverage and efficiency in lab and regression environments.
  • Failure Analysis & Debugging: Collaborate with Firmware, Hardware, and System teams to debug complex system-level issues.
  • Lab Management: Operate and configure high-end cellular network emulators and RF test equipment for both signaling and non-signaling test modes.

Skills:

  • Category
  • Common Tools
  • Network Emulators
  • Keysight (UXM), Rohde & Schwarz (CMW500/CMX500), Anritsu (MT8000A)
  • Diagnostics
  • Qualcomm QXDM/QCAT
  • Automation & Data
  • Python (PyTest), Git
  • RF Analysis
  • Keysight 89600 VSA, Tektronix Spectrum Analyzers

Education/Experience:

  • Mid level System Validation Engineer with min 5 years of experience
  • Education: B.S. or M.S. in Electrical Engineering, Telecommunications, or a related field.
  • Cellular Expertise: Deep understanding of 5G NR (Standalone and Non-Standalone) and LTE-A features like Carrier Aggregation (CA), MIMO, Beamforming, and VoLTE/VoWiFi.
  • Protocol Knowledge: In-depth familiarity with 3GPP protocols and the mobile device-to-network registration and call-flow processes.
  • Hands-on RF Testing: Proficiency with RF lab equipment, including Spectrum Analyzers, Signal Generators, Power Meters, and Vector Network Analyzers (VNA).
  • Programming: Strong proficiency in Python for test script development and data analysis.
  • Log Analysis: Experience using diagnostic tools such as QXDM, QCAT, Wireshark, or similar modem logging software.
  • Background in field testing, drive testing, or Inter-Operability Testing (IOT) with infrastructure vendors (Ericsson, Nokia, Samsung). Knowledge of RF front-end components (PA, LNA, Switches, Filters) and how they impact system-level cellular performance.

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