Senior Electrical Engineer

Description

You’re a Senior Electrical Engineer who will take ownership of the hardware design of our emergency communication devices - sustaining and hardening the current product line while leading the transition to a next-generation, connected/digital platform.

This role sits at the center of that transition: you will keep today's field-deployed hardware reliable while architecting the electrical and firmware foundation for tomorrow's digital products.

Established in 1989 Kings III is a growing, dynamic company. We’re a six-time winner of DFW Top Workplaces and nationally as a USA Today Top Workplace in . We’re on a mission for change - for our communities, our customers, and our company. If you see yourself as a builder and change agent, this is the right place for you.

More than 12% of our employees have been with the company for 10+ years, and an impressive 25% have been with us 5+ years. How do we do it? Here’s what our employees say.

• Own electrical and firmware design across the product line — from maintaining fielded emergency phones (analog/POTS and existing cellular variants) to architecting next-generation digital/connected devices
• Drive schematic capture, PCB layout, and hardware bring-up for both legacy revisions and new digital hardware.
• Design cellular hardware to meet UL/FCC, PTCRB, and First Net certification requirements from the outset of next-generation device architecture.
• Design power architecture for next generation digital/connected devices, including battery backup, power management ICs, and low-power/sleep modes for cellular modules
• Lead firmware architecture for next-generation connected devices — cellular modules, embedded Linux/RTOS platforms, secure boot, OTA update mechanisms
• Design and implement communication stacks (cellular, Wi-Fi, or LTE-M/NB-IoT) integrating with cloud-based monitoring and telemetry
• Partner with cloud/software teams to define device-to-cloud data protocols and APIs
• Build in remote diagnostics, fleet health monitoring, and security (encryption, authentication, secure firmware signing) from the ground up
• Own and maintain clean, accurate design documentation — BOMs, schematics, PCB layouts, and related engineering records — across both fielded and next-generation hardware

• Root-cause field failures reported by Service and the EDC; drive corrective action from schematic/PCB level through firmware
• Manage component obsolescence, second-sourcing, and DFM/DFT issues across the product line
• Support manufacturing and test engineering for production runs, current and new

• Work directly with Product Management (reporting line to VP Product Development) to translate roadmap into engineering requirements
• Collaborate with cross-functional teams to capture feature requirements for digital architecture and resolve recurring issues with existing products
• Support UL/FCC, PTCRB, and First Net certification testing for new cellular hardware revisions
• Mentor junior engineers and contractor/offshore development resources

• BS in Electrical Engineering or Computer Engineering (or equivalent experience); 8+ years in electrical/embedded hardware design
• Strong schematic capture and PCB design/review (Altium or equivalent); comfortable owning a board from concept through production
• Solid firmware development skills in C/C++ for microcontrollers (ARM Cortex-M or similar); RTOS experience (FreeRTOS, Zephyr, or similar)
• Experience with cellular modules (Quectel, Telit, u-blox, or similar) and IoT connectivity protocols (MQTT, TLS/DTLS)
• Debugging with JTAG/SWD, oscilloscopes, logic analyzers; strong lab bring-up…