Modem Chipset Field Test EngineerLocation: [Bellevue, WA] (Onsite / Field-Based)
Travel: up to 15%
Job Type: Full-Time
About the Role
We are seeking a Mobile Field Test Engineer to support 5G/LTE and NTN (Non-Terrestrial
Network) / Satellite testing in real-world environments. This role focuses on end-to-end
validation, log analysis, and troubleshooting across terrestrial and satellite (LEO/GEO, Direct-to-
Device) networks in collaboration with R&D, QA, and carrier teams.
Key Responsibilities
- Perform field/drive testing for 5G NR, LTE, 3G, and NTN/satellite networks
- Execute RF, mobility, and data performance testing (throughput, latency, call scenarios)
- Validate handover between cellular and satellite (NTN) networks
- Capture and analyze logs using QXDM, QPST, XCAL/XCAP, Shannon DM
- Troubleshoot VoLTE/VoNR, data connectivity, and network performance issues
- Develop and execute test plans (routes, devices, KPIs, network conditions)
- Perform packet analysis using Wireshark (TCP/IP, UDP)
- Validate software/modem updates and feature enhancements
- Document results and deliver clear technical reports
- Configure and maintain test devices, SIM/eSIM, and test environments
- Collaborate with carrier labs, OEMs, and chipset teams for issue resolution
Required Qualifications
- Bachelor’s degree in Telecommunications, Electrical Engineering, Computer Science, or equivalent experience
- Hands-on experience in mobile field testing / wireless / telecom testing
- Strong knowledge of 5G NR, LTE, WCDMA/UMTS, GSM
- Working knowledge of NTN / satellite communications (LEO/GEO, latency, coverage)
- Experience with log analysis tools (QXDM, QPST, XCAL, Shannon DM or similar)
- Understanding of network protocols (TCP/IP, UDP, OSI model)
- Experience with Android device testing and mobile software validation
- Familiarity with VoLTE/VoNR, data testing, and KPI validation
- Proficiency in Microsoft Office for reporting
- Strong analytical and troubleshooting skills
Preferred Qualifications
- Experience with 3GPP Release 17+ NTN standards
- Hands-on exposure to Direct-to-Device (D2D) satellite connectivity
- Understanding of 5G protocol stack (PHY, MAC, RRC, NAS signaling)
- Experience in carrier certification or satellite communication testing
- Knowledge of GNSS/GPS, RF propagation, and mobility scenarios
- Familiarity with automation/scripting (ADB, Python, Shell)
- Experience with Wi-Fi, Bluetooth coexistence testing
Work Environment
- Combination of field testing (drive/walk testing) and lab validation
- Testing may include outdoor, remote, or limited-connectivity environments
- Requires travel (up to 15%) based on project scope
- May require extended hours or weekend work for test cycles and deployments
- Hands-on work with mobile devices, RF equipment, and satellite-enabled hardware
Requirements
- Valid driver’s license and ability to travel to test locations
- Ability to work in field environments and handle test equipment
