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Cross-country course builders
Marcin Konarski
Level 4 Cross Country Course Designer.
By bringing in cross-country course builder Marcin Konarski, we have managed to connect a big name to our organisation.
His courses guarantee beautiful technical cross-country courses that are appreciated by both the absolute world elite and amateur riders. Marcin Konarski builds cross-country courses worldwide. In the past, he was a technical delegate in Aachen, Badminton, Adelaide and the 2024 Olympic Games in Paris. In 2026 Marcin is the assistant course designer for Asian Games in Aichi-Nagoya, Japan.
For the next five years, Marcin Konarski will be responsible for our cross-country courses, in which he will provide training and support to our new generation of cross-country course builders Wendela Schlimmer, Nick Ros and Wouter Mosselman. Marcin Konarski is building the 3* and 4* courses in the October 2025 edition of Grandorse Eventing International and is a mentor in the 1* intro and 2*S.
Wendela Schlimmer
Wendela Schlimmer is a former 4* eventing rider who is also known as the organiser and cross-country course designer for Ede Horsetrails.
Wendela is affiliated with Grandorse Eventing International as a cross-country course designer and will be Marcin Konarski's assistant for the 3* in the October 2025 edition.
Nick Ross
The stable of 4* eventing rider Nick Ros is located just outside Amsterdam.
Nick is often seen in action as the driving force behind the Jack Links eventing team, where he trains and coaches young riders at competitions. Nick has gained a lot of experience in building national cross-country courses in recent years and is also a cross-country course builder at Ede Horsetrails. Nick is responsible for the 1* intro at Grandorse Eventing International in the October 2025 edition.
Wouter Mosselman
In addition to being a board member, Wouter is also one of the cross-country course builders at Grandorse Eventing International. In addition to running his own architectural firm, Wouter is a cross-country course builder, technical advisor and is currently training a young eventing horse. In the past, Wouter built eventing obstacles together with his father, something that comes in handy now that he is a cross-country course builder.
Wouter will be building the 2*S at Grandorse Eventing International in the October 2025 edition.

Grandorse Eventing International
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