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# Test Engineer

- **Company:** L & J Engineering Inc.
- **Location:** Broadview, IL, United States
- **Experience:** Experienced
- **Contract:** Permanent contract
- **Skills:** Adobe InDesign, Communications Protocols, Computer Engineering, Ethernet, Firmware, Modbus, Software Reliability Testing, RS-485 Standard, TCP/IP, Test Data, Build Management
- **Published:** October 2, 2026
- **Apply:** https://www.disabledperson.com/jobs/75657101-test-engineer

## About the Role

* Bachelor's degree in Electrical Engineering, Computer Engineering, or a related field.
 * 3-5+ years of experience testing embedded hardware and firmware.
 * Proven ability to write structured test plans, procedures, and reports.
 * Hands-on experience with temperature cycling, EMI/EMC testing, and industrial communication protocols.
 * Knowledge of hazardous-area standards and industrial instrumentation preferred.
 * Strong teamwork, communication, and problem-solving skills.
 * Experience in oil & gas or wastewater industries is a plus.

Reliability and compliance are the job. It is built for a detail-oriented test engineer who validates embedded hardware and firmware for mission-critical industrial environments - oil & gas, wastewater, and hazardous locations - where failure is not an option.

## Description

We are seeking a motivated and detail-oriented Test Engineer to support validation and verification of embedded hardware and firmware for industrial measurement and control systems. Our products operate in oil & gas, wastewater, hazardous environments, and clean industrial applications where reliability and compliance are critical., * Understand product requirements and develop comprehensive test plans and test procedures.

 * Execute verification and validation testing for embedded hardware and firmware systems.
 * Design, develop, and maintain advanced test environments including temperature cycle and thermal stress testing, EMI/EMC compliance testing, and environmental and reliability testing.
 * Validate industrial communication protocols including MODBUS (RTU & TCP/IP), Ethernet-to-MODBUS gateways, and RS485 communication.
 * Design and build custom test fixtures and automation setups.
 * Perform system-level validation of radar, level measurement, temperature, density, BSW, and detection systems.
 * Support hazardous location certifications including FM Approvals, UL, and ATEX requirements.
 * Analyze test data, document results, and generate formal validation reports.
 * Collaborate cross-functionally with hardware, firmware, mechanical, manufacturing, and regulatory teams.
 * Participate in design reviews and contribute to continuous product improvement.