Cellular DevOps Engineer
ManpowerGroup Global, Inc.
- Wind Lake, Wisconsin, United States
- Wind Lake, Wisconsin, United States
About
Team Network Infrastructure & Labs - Cellular Connectivity Role Overview We are seeking a Cellular-DevOps Engineer to join our Wearables Cellular team within Engineering Labs. This role sits at the intersection of public and private 5G/LTE cellular network engineering and DevOps automation, supporting the development and testing of next-generation wearable devices with cellular connectivity. You will be responsible for building, operating, and automating the infrastructure that enables end‑to‑end cellular testing – from RF signal path optimization and modem provisioning to CI/CD pipeline integration and automated IP management services. This is a hands‑on engineering role that requires both hardware lab familiarity and strong software/automation skills.
Key Responsibilities
Cellular & RF Engineering (40%)
Private 5G/LTE Network Operations: Configure and maintain small‑cell/callbox infrastructure supporting NR SA, LTE, and NR‑RedCap across multiple frequency bands (n2, n5, n25, n66, B2, B5, B66)
RF Signal Path Management: Optimize RSRP/RSRQ/SINR measurements in shielded test environments; troubleshoot signal path issues including cabling, attenuation, and antenna configuration
Device Modem Provisioning: Manage modem calibration file provisioning, EFS (Embedded File System) operations, QMI/DIAG interfaces, and modem mode configuration
Cellular E2E Test Execution: Run and validate NR attach/detach cycles, data path verification (ping/DNS/iperf3), GNSS integration, and multi‑RAT connectivity scenarios
Hardware Lab Operations: Stage and pair devices in shield boxes, manage rack equipment mapping, coordinate with callbox vendors, and maintain reference device baselines.
DevOps & Automation (40%)
CI/CD Pipeline Integration: Configure and maintain automated test lanes – both blocking and non‑blocking – for cellular test suites within continuous integration frameworks
Infrastructure‑as‑Code: Manage network ACLs, network configuration pushes, proxy filters, and DNS automation pipelines
Service Development (Python): Build and maintain automated services such as IP management pipelines (static routing, DNS verification, asset tagging, batch processing)
Database & State Management: Administer MySQL databases, schema migrations, configuration management systems, and service state stores
Monitoring & Observability: Instrument services with time‑series metrics, manage alerting thresholds, respond to health alerts, and track SLA compliance
Inventory & Asset Management: Extend and maintain device inventory systems – CLI tools, reservation workflows, and device registration pipelines
Test Framework & Tooling (20%)
E2E Test Development: Author config‑driven cellular E2E tests (JavaScript/Jest) covering LTE, NR SA, NR‑RedCap, and attach/detach scenarios
Callbox Integration Tooling: Develop and maintain Python/Thrift bridges for callbox queries and control RPCs
Modem Utility Libraries: Contribute to shared libraries for device‑side modem management (mode switching, airplane mode, cellular measurements)
Lab Network Tooling: Build and maintain lab network management features (PoE control, port management, VLAN allocation)
Required Qualifications
3+ years of experience in cellular/wireless engineering, DevOps, or a combined infrastructure role
Private cellular network experience: Hands‑on with 4G LTE and/or 5G NR – including cell planning, RF measurements (RSRP, RSRQ, SINR), and UE attach/registration flows
Programming proficiency: Python (primary) with working knowledge of JavaScript; ability to write production services and test automation
Linux systems administration: Comfortable with shell scripting, systemd services, networking (VLANs, static routing, iptables/nftables), and embedded device interaction (adb, fastboot, serial)
Infrastructure automation: Experience with at least two of: CI/CD pipelines, Infrastructure‑as‑Code, configuration management, database administration, or monitoring systems
Debugging mindset: Ability to troubleshoot across the full stack – from RF signal levels and modem firmware to service RPCs and database queries.
Preferred Qualifications
Experience with Amarisoft or similar small‑cell/callbox platforms (Keysight, R&S)
Familiarity with Qualcomm modem tooling (QXDM, QMI, DIAG, NV item provisioning, EFS management)
Exposure to wearable/IoT device development or testing
Experience with Thrift/gRPC service development and service mesh architectures
Knowledge of MCTP/NCSI or other baseboard management protocols
Background in test automation frameworks (Jest, pytest, or similar)
Familiarity with network security tooling (ACL generation, firewall policy management)
Experience operating shielded/anechoic test environments.
What We're Looking For
Quick Learner: Pick up new tools, protocols, and systems fast – whether it's a new modem chipset, a CI framework you haven't used before, or an unfamiliar RF measurement technique. Don’t wait to be taught; dig in and figure it out.
Self‑Starter: Identify problems and fix them without waiting for someone to assign the work. Take ownership when you see a gap in automation or a flaky test.
Comfortable with Ambiguity: Thrive in a role that spans hardware, software, and RF – not terrified by open‑ended problems.
Collaborative: Work across disciplines (firmware, RF, DevOps, test engineering) and communicate clearly with people who have different technical backgrounds.
Bias Toward Action: Ship incremental improvements rather than waiting for the perfect solution. Iterate actively in production lab environments where speed matters.
Detail‑Oriented Under Pressure: RF and modem work demand precision – double‑check your work and build safeguards into your automation.
What Success Looks Like (First 6 Months)
Month 1‑2: Onboard to the cellular lab environment; gain hands‑on familiarity with the callbox infrastructure, wearable devices, and the existing test suite.
Month 2‑3: Own and extend one automation pipeline (e.g., IP management or device inventory); deliver at least one improvement to reliability or throughput.
Month 3‑4: Author or extend a cellular E2E test covering a new band/RAT/scenario; integrate it into the CI pipeline as an automated gate.
Month 4‑6: Drive an infrastructure improvement end‑to‑end – e.g., automated modem provisioning, callbox health monitoring, or test fleet scaling.
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Languages
- English
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