Engineering and QA partner · Rheinfelden, Switzerland
Systems that have to work.
Engineering and quality assurance for embedded systems in industry and rail: firmware, test automation, HIL test benches of any system size. Over 20 years of experience, operating as Hetz Engineering since 2018.
Engagements include
InfraGO
Selection since 2018. Logos are trademarks of their respective owners.
Standards and frameworks we work with
- IEC 61508-3
- EN 50126 / 50128 / 50159
- IEC 61850
- ISO/IEC 17025
- ISO/IEC/IEEE 29119
- IEC 62443-4-1
Services
Embedded systems, test automation, rail – three areas, one standard.
From firmware to test bench – specified, implemented, verified.
Embedded Systems – Industry
Firmware in C/C++, protocol stacks (IEC 61850, HART, fieldbuses, CAN), reverse engineering of interfaces and legacy systems, functional safety to IEC 61508, independent reviews of architecture and development process.
Learn moreQA & Test Automation
Over 20 years of testing experience: test automation for complex systems – substation automation to IEC 61850, train simulation via HIL, device platforms with dozens of variants. Test concepts to ISO/IEC/IEEE 29119, independent reviews, mentoring, interim test management.
Learn moreRail
Telematics systems and vehicle data through to predictive maintenance analysis, vehicle electronics and retrofits, test automation to CENELEC. ECM function 4 under EU 2019/779 in preparation.
ECM function 4 · in preparationLearn more
Also
Hardware & Product Development
Prototypes, telematics and edge gateways, interface specification, 3D printing, PCB X-ray analysis – from idea to tested device.
Learn moreMeasurement & Test Services
RF and radio measurements, LoRa and mesh networks, thermography, measurement data transmission, station automation.
Learn moreProcess Automation
RPA, data pipelines and interfaces for recurring workflows – for industrial companies and SMEs.
Learn more
Situations
What brings customers to us.
Six situations we know – and what we make of them.
- 01
"The auditor asks for traceability and coverage."
Test concept to ISO/IEC/IEEE 29119, evidence and metrics that hold up in an audit – IEC 61508, CENELEC or ISO/IEC 17025.
Test concept and review - 02
"The device has to pass the standard."
Conformance to IEC 61850, functional safety up to SIL 2: we check concept, process and code beforehand – and find what would otherwise show up in the field.
Embedded systems - 03
"Our test manager has left."
Interim QA leadership from the first week, reporting up to executive level, a handover plan from the start.
Interim test management - 04
"We need the data from our existing fleet."
Bringing telematics onto vehicles with no documentation left – reverse engineering, CAN/MQTT/REST, dashboards through to predictive maintenance.
Rail - 05
"Our regression takes weeks."
Automation where risk and repetition are highest: HIL test bench, end-to-end suites, smoke tests in the pipeline.
Test automation - 06
"We need a second opinion."
Independent review of test concept and development process – with a prioritised list of measures and concrete findings.
Independent review
References
Three engagements that show how we work.
Review with roadmap, telematics end-to-end, functional safety with HIL – from energy, rail and process automation.
since 05/2025ongoing
- Embedded Systems
- QA & Test Automation
ABB Switzerland Ltd, Turgi
Power engineering / medium voltage
Independent review of the test concept of a medium-voltage platform – test levels, coverage, traceability – with a prioritised list of measures, a roadmap for test automation, SAST and CI/CD, and an assessment of CRA readiness to IEC 62443-4-1.
- ISTQB
- IEC 62443-4-1
- CRA
- SAST
- CI/CD
since 04/2025ongoing
- Rail
- Process Automation
DB InfraGO
Rail
End-to-end technical project lead for a telematics solution: reverse engineering of existing vehicle systems, connection of CAN, MQTT and REST, scalable dashboards and automated test systems – for data-driven fleet availability.
- CAN
- MQTT
- REST
- Embedded
- Data analysis
01/2021–12/2021
- Embedded Systems
- QA & Test Automation
IFM
Process automation
Test concept, continuous integration and HIL test bench (dSPACE, LabVIEW) for a functional safety platform to IEC 61508 SIL 2 – from unit tests to EMC, temperature and load tests.
ResultTest concept and test systems for a SIL 2 platform with 32 device variants
- IEC 61508-3
- SIL 2
- HIL
- dSPACE
- LabVIEW
Testimonials
What customers and committees say about working with us.
Engineers from Hetz Engineering supported us in implementing test automation. Their expertise was very helpful and contributed significantly to the success of the project.
Hetz Engineering has superior knowledge of IEC 61850. For ANY 61850 consulting, they would be among my top choices.
Our company deployed engineers from Hetz Engineering for testing on one of our customer projects. We are very satisfied with the work and will gladly return to Hetz Engineering when we need support again.
How we work
Understand first, then build, then hand over.
This is how our engagements run – whether review, test bench or test automation.
- 01
Clarify the starting point
Review of architecture, test concept and development process, stakeholder workshops, goal definition. Result: a sound picture of maturity, risks and required action.
- 02
Concept and roadmap
Test concept to ISO/IEC/IEEE 29119, test automation architecture or action plan – prioritised, with implementation horizons and effort estimates. Traceability from requirement to test case.
- 03
Implement
HIL test benches, test automation, CI/CD pipelines, firmware: running, documented, integrated into your toolchain and your team. Milestones with sign-off instead of surprises.
- 04
Hand over and enable
Templates, training material, mentoring. Goal: your team operates and extends the solution independently.
In more than 20 years we have seen a lot of mistakes. Our clients do not have to make them again.
About us
Engineering and quality assurance with reference to standards – from requirement to evidence.
Hetz Engineering is an engineering and QA partner for embedded systems, quality assurance and rail technology. We build and lead QA organisations, establish test strategies and implement end-to-end test automation – in energy, process automation, rail, telecommunications, finance, plant and mechanical engineering and building automation.
More about us- 240+
- applications in one end-to-end test architecture
- 32
- device variants of a SIL 2 platform, tested automatically
- 10
- communication protocols, fully automatically tested and deployed
- 15
- engagements since founding in 2018 – from ABB to DB InfraGO
Let's talk about your project.
A first conversation clarifies the task, the approach and the effort.
What happens next
- 01
Intro call
30 minutes online: your task, our questions, a first assessment.
- 02
Short written assessment
Whether and how we can help, which approach fits, roughly what it takes.
- 03
Offer with a clear scope
Service, result, time frame – you decide, we start.
Prefer writing? Send an email