Hardware in the Loop Test Engineer

Leidos is hiring a Hardware in the Loop Test Engineer to support Hypersonics programs in Huntsville, AL (onsite).

Responsibilities

• Support electrical engineering development, integration, and execution of Hardware-in-the-Loop (HWIL) test systems for avionics, embedded systems, electronic hardware, and related software
• Develop HWIL electrical architectures that provide representative interfaces between the system under test and the simulated environment
• Design, integrate, and troubleshoot electrical interfaces including analog, digital, discrete, serial, Ethernet, power, and other system-specific interfaces
• Develop and integrate HWIL interface hardware such as signal conditioning, switching, loads, power supplies, signal generation, data acquisition, and instrumentation
• Interpret requirements and engineering documentation (electrical schematics, wiring diagrams, interface control documents, and equipment specifications) to implement effective HWIL solutions
• Develop and maintain HWIL interface designs and associated electrical deliverables, including wiring, cable assemblies, electrical drawings, interface documentation, and configuration information
• Select and configure laboratory and test equipment such as oscilloscopes, digital multimeters, power supplies, electronic loads, signal generators, and data acquisition systems
• Integrate real-time simulation platforms with electronic hardware and systems under test
• Create test cases and scenarios covering nominal, off-nominal, fault, startup, shutdown, degraded, and boundary operating conditions
• Apply test-like-you-fly methodologies to ensure HWIL environments accurately represent operational system interfaces and conditions
• Develop and implement automated test procedures and supporting software using Python, C/C++, C#, LabVIEW, MATLAB/Simulink, or similar tools
• Integrate embedded software, firmware, and electronic hardware into HWIL environments for system-level verification and validation
• Troubleshoot complex electrical and system-level issues across power, signal integrity, I/O, instrumentation, wiring, interfaces, communication buses, and HWIL equipment
• Perform root-cause analysis of hardware and system failures and provide technical recommendations to electrical, software, firmware, and systems engineering teams
• Analyze test data and instrumentation outputs to identify anomalies, characterize performance, and support verification activities
• Maintain test requirements, procedures, test reports, electrical documentation, configuration records, and requirements traceability
• Support automated regression testing and integration of HWIL activities into software development and CI/CD environments
• Maintain configuration control of HWIL hardware, electrical interfaces, instrumentation, test software, simulation models, and test artifacts
• Coordinate with engineering organizations across electrical, software, firmware, systems, mechanical, manufacturing, and program teams to resolve issues and improve performance
• Participate in design reviews, test readiness reviews, technical interchange meetings, customer meetings, and supplier discussions
• Mentor less-experienced engineers supporting HWIL activities
• Assist with technical planning, task estimation, scheduling, equipment selection, and execution of HWIL test activities
• Identify improvements to HWIL test efficiency, repeatability, maintainability, safety, and cost effectiveness

Requirements

• Bachelor’s degree in Electrical Engineering, Computer Engineering, or a related engineering discipline
• 8+ years of experience in electrical engineering, test engineering, HWIL/HIL development, avionics, embedded systems, or a related technical discipline
• Experience developing, integrating, or troubleshooting HWIL, SIL, automated test, or comparable verification systems
• Strong understanding of electrical system interfaces including analog, digital, discrete, serial, Ethernet, power, and/or other electronic interfaces
• Ability to read and interpret electrical schematics, wiring diagrams, interface control documents, electrical specifications, and related documentation
• Experience integrating electronic hardware, instrumentation, data acquisition, signal conditioning, power systems, and automated test equipment
• Hands-on experience with laboratory test equipment (oscilloscopes, digital multimeters, power supplies, signal generators, electronic loads, data acquisition equipment)
• Experience developing or supporting automated test procedures using Python, C/C++, C#, LabVIEW, MATLAB/Simulink, or similar tools
• Familiarity with communication protocols such as Ethernet, CAN, SPI, I2C, RS-232/422/485, ARINC-429, MIL-STD-1553, or similar
• Experience troubleshooting complex electrical and hardware/software integration issues
• Experience with verification and validation, automated testing, regression testing, or formal test methodologies
• Experience using Git or another configuration-management system
• Strong analytical, troubleshooting, and problem-solving skills
• Strong written and verbal communication skills
• Ability to work effectively across electrical, software, firmware, and systems engineering disciplines
• Full-time work authorization in Huntsville, AL
• U.S. Citizen and eligible to obtain and maintain a Secret security clearance

Technologies

• Python
• C/C++
• C#
• LabVIEW
• MATLAB/Simulink
• Git
• Ethernet
• CAN
• SPI
• I2C
• RS-232
• RS-422
• RS-485
• ARINC-429
• MIL-STD-1553
• CI/CD
• GitLab
• GitHub
• JIRA
• Confluence
• DOORS
• dSPACE
• NI VeriStand
• Speedgoat
• OPAL-RT
• RTDS
• FPGA
• NI PXI
• cRIO
• TestStand

Benefits

• Health and Wellness programs
• Income Protection
• Paid Leave
• Retirement

Preferred Qualifications

• Master’s degree in Electrical Engineering, Computer Engineering, or a related field
• Direct experience developing HWIL systems for aerospace, defense, avionics, or other safety-critical embedded systems
• Experience with dSPACE, NI VeriStand, Speedgoat, OPAL-RT, RTDS, or similar real-time HWIL platforms
• Experience designing custom HWIL interface electronics, signal-conditioning circuits, I/O architectures, switching systems, or load banks
• Experience with FPGA-based systems, high-speed data acquisition, deterministic communications, or real-time I/O
• Experience with NI PXI, cRIO, DAQ, LabVIEW, TestStand, or similar test platforms
• Experience with MATLAB/Simulink and real-time simulation environments
• Experience with avionics interfaces and protocols such as ARINC-429, MIL-STD-1553, CAN/CAN-FD, RS-422/485, Ethernet, or similar
• Experience with PCB design, board-level electronics, power electronics, or electronic circuit troubleshooting
• Experience with signal integrity, grounding, shielding, EMI/EMC, or electrical noise mitigation
• Experience developing reusable HWIL electrical architectures and test infrastructure
• Experience integrating embedded software and firmware into hardware verification environments
• Experience with CI/CD and automated software regression environments
• Experience with JIRA, Confluence, GitLab, GitHub, DOORS, or similar engineering tools
• Experience with systems engineering, requirements traceability, verification planning, and formal test documentation
• Experience with RF test, calibration/metrology, environmental testing, or other specialized electronic test methodologies
• Experience applying aerospace/defense standards or military specifications
• Experience supporting DoD programs or working within classified environments
• Existing Secret security clearance
• Experience representing engineering organizations during customer reviews, design reviews, technical interchange meetings, or supplier engagements

Pay Range: $107,900.00 - $195,050.00 per year

Original Posting Date: September 28, 2026