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# Systems Integration & Test Engineer III / IV

- **Company:** Zone 5 Technologies
- **Location:** San Luis Obispo, United States
- **Experience:** Experienced
- **Salary:** $129,000.0 - $149,000.0
- **Contract:** Permanent contract
- **Skills:** Configuration Management, Code Generation, Communications Protocols, Ethernet, Hardware-In-The-Loop Simulation, MATLAB, Signal Integrity, Static Timing Analysis, System Testing, Systems Integration, Universal Asynchronous Receiver/Transmitter, Integration Tests
- **Published:** September 4, 2026
- **Apply:** https://startup.jobs/systems-integration-test-engineer-iii-iv-zone-5-technologies-8336916

## About the Role

* Bachelor's degree in relevant engineering field
 * 3-8+ years of experience in aerospace integration/test
 * Strong understanding of embedded systems and avionics architectures
 * Experience working independently in lab/test environments

Preferred

 * SIL / HIL experience
 * Flight test support experience
 * Configuration management experience
 * UAV/autopilot integration experience

Leveling Signals

 * Works independently on well-defined problems
 * Owns subsystems or test environments
 * Mentors junior engineers
 * Contributes to system-level decisions

## Description

At Zone 5 Technologies, Systems Integration & Test Engineers support the development and execution of Hardware-in-the-Loop (HITL) environments, as well as the integration, bring-up, and validation of new technologies and features.

This role is hands-on and execution-focused, operating within a collaborative cross-functional team to mature, integrate, test, and troubleshoot avionics, systems, and subsystems prior to production.

Mid-level engineers in this role independently develop & execute integration and HITL test environments, own subsystem-level integration efforts, and play a key role in validating hardware and software prior to testing. This position balances hands-on engineering with increasing technical ownership and responsibility.

Responsibilities

HITL Development & Ownership

 * Develop and maintain flight-representative HITL rigs
 * Integrate avionics, sensors, and control systems into test environments
 * Develop scripts/tools for simulation-driven testing
 * Lead feature validation and signal verification activities

Model-Based Development (Software)

 * Develop and maintain MATLAB/Simulink models for system validation
 * Support code generation and embedded integration
 * Validate control logic and system performance

Avionics Integration (Avionics)

 * Design wiring harnesses and signal routing architectures
 * Validate communication protocols (CAN, Ethernet, UART)
 * Perform signal integrity and timing analysis

Mechanical Integration (Mechanical)

 * Design packaging solutions considering SWaP constraints
 * Support thermal management and environmental validation
 * Develop integration hardware and mounting solutions

Ground Testing & Flight Support

 * Execute and lead integration test procedures
 * Identify, troubleshoot, and resolve integration issues
 * Support flight test campaigns and on-aircraft validation


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