Wireless Test Engineer Jobs (NOW HIRING)

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 safetycritical services for connected vehicles. This roleis responsible fortranslating detailed technical and regulatory requirements into comprehensive test strategies, test cases, and automated test scripts thatvalidateendtoend system performance across multiple networks, operators, and markets.

You will be a handson 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
• Applicationlevel 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, powersaving features.
• Design and executemobility and roaming scenarios, including:
• Intra and interfrequency handovers
• InterRAT mobility (e.g., LTE-NR, LTE-3G/2G where applicable)
• Domestic and international roaming, PLMN selection, and operatorspecific 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/NGeCall or regional equivalents, emergency call routing, fallback behaviors, and priority handling.
• Special features: operator or GMspecific services (e.g., dataonly modes, tethering, OTA updates, remote commands, telematics features).
• Validateendtoend system behaviorincluding invehicle integration, backend/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 CrossFunctional Collaboration

• Perform deepdive analysis offield and lab issuesinvolving RF, protocol, and servicelevel failures; reproduce and triage with modem suppliers, network operators, and internal teams.
• Collaborate closely withhardware design, modem/software, systems engineering, regulatory, and backend/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 handson 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.
• Handson 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 invehicle integration and backend/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, carrierspecific programs).
• Experience withmultiRAT and multiSIM devices, as well as coexistence with other radios (WiFi, Bluetooth, GNSS).
• Background inrequirements management and traceabilitytools, and in building coverage metrics for large test suites.