Board 2026-2027

Keylie Knegt
Chair
Meet Keylie, ready to take on the role of chair for the second time! She’s been a part of Deltaserat for 5 years now, and it’s safe to say that the club has become a big part of her life. The friendly atmosphere, the sense of community, and of course, the people are what made her fall in love with Deltaserat. Keylie started out with kickboxing and has recently added MMA to the mix. But there’s more to her than martial arts! In her free time, she loves travelling, drawing and painting, going to concerts and the cinema, hanging out with friends, and cooking up delicious food. As chair, Keylie helps organise everything that goes on in the club. So, if you have any questions, ideas, or want to get involved and help out, don’t hesitate to reach out to her!
What you need to know about our chair:
- She manages the structure of the association and checks our overall progress throughout the year.
- She is the first point of contact between ACLO and our association and you can go to her with any concerns relating to this communication.
- She keeps track of trainings to make sure that they are all running smoothly and according to the wishes of our members.
- You can always come up to her if you have any questions, to share your concerns or just to have a chat!
Cosmin CÎrlan
Secretary
Meet Cosmin! After 8 years with the club, he’s now stepping up as the new secretary of Deltaserat. What kept him coming back? The intensity of the training, the skills of the coaches, and, most importantly, the community that makes this club feel like home. Starting out as a grappler, he went on to try pretty much every martial art Deltaserat has to offer (and then some!). These days, you’ll mostly find him at Kickboxing and MMA training. As secretary, Cosmin will be the link between the members and the board, helping everyone stay connected and informed. So, if you have any questions or need something clarified, don’t hesitate to reach out!
These are the tasks of our secretary:
- Covering communication between the board and the members of our association.
- Making announcements for upcoming events and socials.


Dennis Steenbergen
Treasurer
Meet Dennis, our trusted treasurer, joining the board for the second year in a row! Moving from Germany to Groningen to study Psychology, Dennis has been training kickboxing with Deltaserat for more than 3 years now. Joining initially to learn martial arts and get more fit in the process, Dennis has stuck around for the warm atmosphere and the community around the club. On the mats, Dennis is a tenacious and technical fighter, able to close in on and then pick apart his opponent. Apart from his studies and training kickboxing, he likes to play the piano and pool in his free time. As treasurer, Dennis manages the clubs finances and memberships. If you have any questions about memberships, payment options or anything else related, feel free to contact him!
What you need to know about our treasurer:
- He keeps track of our funding, budget and membership fee throughout the whole year.
- He is in charge of delegating funds to our social and training exchange events.
- He is the point of contact for if you want to cancel your membership with the association — this can be done through sending an email to: [email protected]
Kasper Le loux
External Affairs
Meet Kasper, our new external affairs manager! Hailing from Leiden, Kasper has been practising martial arts since his youth, joining Deltaserat 2 years ago to practice Kickboxing. With his intense stature and confidence, Kasper is a formidable foe on the mats who never backs down from a fight. In our club, Kasper is our connection point to other associations, as well as venues for association events. In managing these events, he effortlessly rallies together our members to strengthen our community. Apart from Deltaserat, Kasper fittingly studies Human Movement Sciences, equipping him with expert knowledge on how to push his limits during training, and swiftly recover afterwards. Energetic but easy-going at heart, he is always eager to connect with new people: If you have ideas or leads for cool events for the association, Kasper is exactly who to look for (and he's impossible to miss)!
What you need to know about our external affairs manager:
- He manages communication between the association and external parties for socials and activities
- You can always contact him for interest in joining an association committee, or sharing ideas for events and activities!

2025 - 2026
President: Caroline Winkler
Secretary: Roza Fromlewicz
Treasurer: Dennis Steenbergen
Fight Team manager: Fadi Rezkallah
2024 - 2025
President: Josephine Brenøe
Secretary: Roza Fromlewicz
Treasurer: Candelas Gross Valle
Fight Team manager: Fadi Rezkallah
2023 - 2024
President: Keylie Knegt
Secretary: Roza Fromlewicz
Treasurer: Candelas Gross Valle
External affairs: Virginia Cacciavillan
PR manager: Fadi Rezkallah
2022 - 2023
President: Josephine Brenøe
Secretary: Candelas Gross Valle
Treasurer: Veronica Bodescu
External affairs: Virginia Cacciavillan
Internal affairs: Daniela Ribanská
PR manager: Fadi Rezkallah
2021 - 2022
President: Lea Timmann
Secretary: Leonie Schwantzer
Treasurer: Veronica Bodescu
External affairs: Nica Bedoshvili
2020 - 2021
President: Sjouke de Vries
Secretary: Vlad Malai
Treasurer: Lea Timmann
External affairs: Nica Bedoshvili
Internal affairs: Kit-Yi Feng
2019 - 2020
President: Bas Van Doorn
Secretary: Sameer Rodrigues
Treasurer: Lea Timmann
In-/external affairs: Olena Vasyltsova
2018 - 2019
President: Tom Jalink
Secretary: Rob Heidenrijk
Treasurer: Lukas Dekker
In-/external affairs: Vlad Malai
2017 - 2018
President: Tom Jalink
Secretary: Chen Wei Xwan Guo
Treasurer: Lukas Dekker
In-/external affairs: Dasha Leshchynskaya
2016 - 2017
President: Rob Heidenrijk
Vice-president: Willard Holthof
Secretary: Toni Hoenders
Internal affairs: Sander Hendriks
External affairs: Sietske Doorenbos
2015 - 2016
President: Rob Heidenrijk
Secretary: Toni Hoenders
Treasurer: Martijn Zuiderbaan
Internal affairs: Chen Wei Xwan Guo
Public relations: Willard Holthof
2014 - 2015
President: Rob Heidenrijk
Vice-president: Floris Wolven
Secretary: Malou Luchtenberg
Treasurer: Martijn Zuiderbaan
Internal affairs: Brendan Jager
Public relations: Willard Holthof
2013 - 2014
President: Martijn Zuiderbaan
Vice-president: Rob Heidenrijk
Secretary: Malou Luchtenberg
Treasurer: Floris Wolven
Internal affairs: Brendan Jager
Public relations: Lindsay de Villiers
2012 - 2013
Chairman: Martijn Zuiderbaan
Secretary: Rob Heidenrijk
Public relations: Isabelle van Ouderaa

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