Senior Wireless Test Engineer

This role is categorized as hybrid. This means the successful candidate is expected to report to the GM Global Technical Center in Warren, MI three times per week, at minimum [or other frequency dictated by the business if more than 3 days]. The Role TheSenior Wireless Test Engineer – Cellular Systemswill lead lab and field validation of GM’s 4G and 5G cellular connectivity, ensuring robust voice, data, and safety‑critical services for connected vehicles. This roleis responsible fortranslating detailed technical and regulatory requirements into comprehensive test strategies, test cases, and automated test scripts thatvalidateend‑to‑end system performance across multiple networks, operators, and markets. You will be a hands‑on technical leader, defining test methodologies, selecting tools and equipment, executing complex test campaigns, and driving issue resolution with internal teams and external partners. What You’ll Do Test Strategy, Planning, and Design Translate system, feature, and regulatory requirements intostructured test plans, test cases, and scriptscovering lab and field validation for cellular connectivity. Definetest coverage strategyfor: RF performance and parametric tests Protocol stack behavior for4G LTE and 5G NR Mobility, roaming, and handover scenarios Application‑level voice, data, SMS, emergency calls, andspecial features. Identifytools, test equipment, fixtures, and environmentsrequiredto fullyvalidaterequirements (e.g., RF chambers, call boxes, loggers, automation frameworks, simulators, load generators). RF Performance and Parametric Validation Develop and executeRF performance and parametric test cases(e.g., output power, sensitivity, ACLR, EVM, throughput vs. RSRP/RSRQ/SINR, spectrum mask). Specify and useRF test equipmentsuch as signal generators, spectrum/network analyzers, OTA chambers, and channel emulators. Analyze RF measurements, correlate with requirements and KPIs, and drive corrective actions with hardware and modem engineering teams. Cellular Protocol and Mobility Testing (4G/5G) Develop detailed test cases and scripts to validate4G/5G protocol stack behavior, including: Attach/registration, bearer/session setup, authentication, and security procedures Mobility management, idle/connected mode behaviors, DRX, power‑saving features. Design and executemobility and roaming scenarios, including: Intra‑ and inter‑frequency handovers Inter‑RAT mobility (e.g., LTE–NR, LTE–3G/2G where applicable) Domestic and international roaming, PLMN selection, and operator‑specific features. Validatethroughput and latencyacross multiple radio conditions, bands, and network configurations; create performance benchmarks and regression baselines. Service and Feature Validation (Voice, Data, SMS, Emergency, Special Features) Develop andmaintaintest suites for: Voice services: CS voice (where relevant), VoLTE/VoNR, supplementary services, audio quality KPIs. Packet data: IP connectivity, QoS, APN configurations,VPNand secure tunnel behavior. Messaging: MO/MT SMS, concatenated messages, delivery reports, failure handling. Emergency services: eCall/NG‑eCall or regional equivalents, emergency call routing, fallback behaviors, and priority handling. Special features: operator‑or GM‑specific services (e.g., data‑only modes, tethering, OTA updates, remote commands, telematics features). Validateend‑to‑end system behaviorincluding in‑vehicle integration, back‑end/cloud interfaces, and mobile network interactions. Automation, Tooling, and Infrastructure Developautomated test scripts and parsersfor cellular and RF test execution, log collection, and results processing. Define andmaintaintest benches, automation frameworks, and CI/regression test suitesfor cellular validation. Specify and integratetest toolssuch as: Cellular network simulators / call boxes RF channel emulators and OTA chambers Packet sniffers, protocol analyzers, and logging tools Traffic generators for voice/data/SMS and application load. Drivetest data management: logging, parsing,metricsdashboards, and traceability between requirements, test cases, and results. Debug, Analysis, and Cross‑Functional Collaboration Perform deep‑dive analysis offield and lab issuesinvolving RF, protocol, and service‑level failures; reproduce and triage with modem suppliers, network operators, and internal teams. Collaborate closely withhardware design, modem/software, systems engineering, regulatory, and back‑end/cloud teamsto: Clarify requirements and KPIs Prioritize defects and drive design or software changes Improve test coverage and methodologies over time. Provide clear, concisetest reports and technical summariesfor leadership, program teams, and external stakeholders. Your Skills & Abilities (Required Qualifications) Bachelor’s degreein Electrical Engineering, Computer Engineering, Telecommunications, or relatedfield. 5+ yearsof hands‑on experience in cellularwireless testing or validation(4G LTE and/or 5G NR) in automotive, telecom, handset, or modem domains. Strong understanding of: Cellular RF fundamentals(power, sensitivity, link budget, interference, fading) 4G/5G protocol stack(RRC, PDCP, RLC, MAC, PHY; NAS and core network interactions) Mobility and roaming concepts, including handovers, reselection, and tracking areas. Demonstrated experience developingtest plans, test cases, and test scriptsfor: RF performance and parametric checks Cellular protocol procedures (attach, bearer setup, registration, security) Mobility/roaming, throughput, and latency characterization Voice, data, SMS, and emergency call scenarios. Hands‑on experience withcellular test equipment and tools, such as: Call boxes / network simulators (e.g., Keysight, R&S, Anritsu, Spirent, etc.) Spectrum/network analyzers, signal generators, channel emulators Protocol analyzers and log tools (e.g., QXDM, QCAT, modem logs, Wireshark). Strongdata analysis and debugging skills, with the ability to interpret complex RF and protocol logs and narrow down root causes. Proven ability totranslate requirements into testable criteriaand define the tools, instrumentation, and configurations needed for full coverage. Excellentwritten and verbal communication skills, including the ability to document test methods, results, and recommendations clearly. What Can Give You a Competitive Advantage (Preferred Qualifications) Master’s degree in a related engineering field. Experience withautomotive connectivityortelematicscontrol units (TCUs), including in‑vehicle integration and back‑end/cloud connectivity. Knowledge of Hardware design, PCB, and traces. Familiarity withemergency call regulations, public safety requirements, and regional differences in emergency services. Experience withtest automation frameworks(Python or similar) for cellular/RF testing, including scripting for call box control and log parsing. Knowledge ofoperator certification, conformance, and regulatory test processes(e.g., PTCRB, GCF, carrier‑specific programs). Experience withmulti‑RAT and multi‑SIM devices, as well as coexistence with other radios (Wi‑Fi, Bluetooth, GNSS). Background inrequirements management and traceabilitytools, and in building coverage metrics for large test suites. This job is not eligible for relocation benefits. Any relocation costs would be the responsibility of the selected candidate. Compensation: The expected base compensation for this role is: $106,600 - $165,700. Actual base compensation within the identified range will vary based on factors relevant to the position. Bonus Potential:An incentive pay program offers payouts based on company performance, job level, and individual performance. Benefits: GM offers a variety of health and wellbeing benefit programs. Benefit options include medical, dental, vision, Health Savings Account, Flexible Spending Accounts, retirement savings plan, sickness and accident benefits, life insurance, paid vacation & holidays, tuition assistance programs, employee assistance program, GM vehicle discounts and more. GM DOES NOT PROVIDE IMMIGRATION-RELATED SPONSORSHIP FOR THIS ROLE. DO NOT APPLY FOR THIS ROLE IF YOU WILL NEED GM IMMIGRATION SPONSORSHIP NOW OR IN THE FUTURE. THIS INCLUDES DIRECT COMPANY SPONSORSHIP, ENTRY OF GM AS THE IMMIGRATION EMPLOYER OF RECORD ON A GOVERNMENT FORM, AND ANY WORK AUTHORIZATION REQUIRING A WRITTEN SUBMISSION OR OTHER IMMIGRATION SUPPORT FROM THE COMPANY (e.g., H-1B, OPT, STEM OPT, CPT, TN, J-1, etc.) #J-18808-Ljbffr General Motors