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Services

At JSI, we provide tailored structural engineering solutions that bring architectural designs to life. We believe in tailoring our expertise to your specific needs, ensuring a personal touch through direct contact with Jan Stelcl, our dedicated professional. 

Timber construction

Steel construction

Concrete and masonry construction

We specialise in:

  • Performing calculations on all kinds of load bearing structures.

  • Carefully determining which materials (timber, steel, and others) will be the most appropriate. 

  • Using the latest civil engineering software (Cadwork and others) to optimise the design of each and every detail of your building.

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Blueprint

We offer:

  • Advice for architects and builders

  • Structural design for new constructions and renovations 

  • Static and execution plans for detailed timber, steel, concrete and brick buildings

  • Tendering

What makes us unique?

Tailor-made expertise

We offer tailor-made expertise to our clients. Through direct personal contact with Jan Stelcl, the founder of JSI, we provide a personalised experience. Jan Stelcl, brings a unique perspective to our projects, understanding the importance of creating spaces that fulfill the vision of our clients.

Diverse project experience

JSI has developed a careful understanding of the civil engineering requirements of modern buildings, as well as renovations, enhancements, and expansions of existing constructions. Our extensive experience includes working on a wide range of projects, such as private homes, hotels, factories, school buildings, bridges, shopping centres, garden pavilions, film festival constructions and botanical glass houses. We bring this diverse project experience to every new endeavour.

Engagement

Customer satisfaction is paramount at JSI. We are committed to delivering the best quality work within a reasonable timeframe. Our goal is to complete projects efficiently, ensuring that our clients can enjoy their constructions with utmost satisfaction.

Ensuring safety and security

JSI places a strong emphasis on safety and security. Our team is equipped with earthquake training and expertise in calculating earthquake risks using the Response Spectrum Method. We understand the importance of ensuring that our clients feel safe and secure in their constructions, allowing them to enjoy their spaces for many years to come.

Extensive expertise

With 14 years of practical competence in Switzerland and experience in the Czech Republic, Germany, England, and Zambia, JSI brings a wealth of knowledge to every project.


With Jan Stelcl's further degree in intercultural studies, JSI embraces collaboration with partners around the globe.

 

Our team's expertise and diverse experiences enable us to provide innovative solutions that meet the highest standards of quality.

Holistic material selection

Wood, steel, concrete, or a mix of these materials is used to create high-quality modern constructions or renovations. The focus is on using materials that are not only durable and aesthetically pleasing, but also sustainable.

Let's chat about your next project!

Contact

 â€­+41 76 361 14 50‬

Disclaimer

Jan Stelcl Ingenieur GmbH
Blumenstrasse 2

8500 Frauenfeld
Switzerland

© 2025 Jan Stelcl Ingenieur GmbH.

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