• Hardware-in-the-Loop (HIL) Test Engineer

    US Tech Solutions (Juno Beach, FL)


     

    Duration: 12+ months contract with potential extends or Convert

    Job Description:

    + Own the Hardware-in-the-Loop (HIL) test platform validating control software for utility-scale Battery Energy Storage Systems (BESS).

    + You’ll develop real-time plant models in Simulink, run them on Speedgoat at ~1 ms base rates, integrate with power plant controller PLCs over Modbus/TCP and DNP3, and automate requirement-based test suites with a focus on fast, deterministic controller validation (not microgrid stability studies).

    Responsibilities:

    + Build & operate HIL rigs: configure Simulink Real-Time on Speedgoat, map I/O harness, and manage deterministic scheduling; optimize solver settings for ~1 ms steps.

    + Model the plant: create/maintain Simulink/Simscape Electrical models for PCS/inverter, filters/transformer, battery/Client; validate model fidelity against bench/site data.

    + HIL simulation: connect Schneider M580 PLC to Speedgoat via Modbus TCP; verify commands, telemetry, time sync, alarms/events, and fail-safe sequences end-to-end.

    + Author requirement-based tests: derive MiL/SiL/HIL cases for power/VAR control, ramp-rate, freq/volt response, SoC management, thermal derates, ride-through, startup/shutdown, and fault scenarios.

    + Automate regression: implement scripted test suites with pass/fail metrics, waveform capture, and auto-reports; integrate with Git and CI workflows.

    + Defect lifecycle: analyze logs, isolate root causes across controller ↔ PLC ↔ plant model, file issues, verify fixes, and maintain full traceability (requirement → test → result).

    + Rig reliability & safety: maintain configs/calibrations/harnesses, implement health checks, and observe lab.

    Experience:

    + 3–7+ years in embedded/controls test & validation with HIL.

    + Strong MATLAB/Simulink skills (Simulink Test, Simulink Real-Time; Simscape Electrical).

    + General programming/scripting experience (Python, VBA).

    + Hands-on Speedgoat experience at ~1 ms base rates (fixed-step solvers, rate transitions, task partitioning).

    + PLC integration experience; Schneider M580 familiarity preferred; understanding of IEC 61131-3 concepts.

    + Protocols: Modbus/TCP and DNP3 (command/telemetry, time-stamped events, buffers).

    + Version control with Git; comfort with code reviews and branching strategies.

    Skills:

    + Clear communication, root-cause analysis, and documentation skills.

    Education:

    + B.S./M.S. in Electrical/Controls/Power/Mechatronics or related field.

    About US Tech Solutions:

    US Tech Solutions is a global staff augmentation firm providing a wide range of talent on-demand and total workforce solutions. To know more about US Tech Solutions, please visit www.ustechsolutions.com (http://www.ustechsolutionsinc.com) .

     

    US Tech Solutions is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.