Dennis de Booij 🇳🇱
281 profile views · Last seen 1 hour(s) ago
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About
- Training since first belt2 year(s) and 11 month(s)
- Training logged487hr 20m
- LocationLeiden, Zuid-Holland, Netherlands
- AcademyUNDERHOOK SOCIETY Verified
Achievements
2 of 18 unlockedCurrent rank verified by promoting instructor
Profile manually reviewed & certificate issued
Name verified by credit card
Verifications received14 / 25
102550
Years trained2 / 5
5101520
Gold medals0 / 5
51025
Competition matches0 / 10
1050100
Forum posts5 / 500
5001,000
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Gallery
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Juggy van Beek. K-guard seminar
Helio Moreira SONECA BJJ Seminar on half guard. 14 December 2025, Leusden, the Netherlands
Trained at CVA jiujitsu in Edinburgh together with fellow globetrotters David Rogers (coach) and Nathan Ferguson.
Attended BJJ Globetrotters Spring Camp in Tallinn Estonia. 14 April to 19 April 2025.
Remco Pardoel seminar Leiden 23 March 2025
Thiago Abreu seminar on sweeps from spider/lasso/DLR guard combinations on Oct 6, 2024 @ BJJ Leiden, The Netherlands
Attended Spar Wars on 14 Jan 2024 in Dordrecht, The Netherlands. Two hours of sparring.
First BJJ training with Iwan Hansen at USC LeidenPromotion history
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- 1 year, 4 months, 8 days
Blue belt Current belt
May 23, 2025Underhook Society, Leiden, The Netherlands
Promoted by- Stripe 1September 12, 2025
- 1 year, 7 months, 10 days
White belt
October 13, 2023Leiden, The Netherlands
- Stripe 1December 15, 2023
- Stripe 2May 31, 2024
- Stripe 3September 13, 2024
- Stripe 4December 6, 2024
Votes received for current rank
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"Dennis, is my student and also an example for me and the whole team. Congratulations buddy, well deserved. Be Like Dennis!!!"
DDThanks, coach! You're my example to keep a positive mind set.
1 year(s) ago
"Have rolled with Dennis confirm blue belt"
DDThanks, David!
8 month(s) ago
"Confirmed by coach & picture of promotion. Congrats on the blue belt 👍"
DDDanke, Claudia!
1 year(s) ago
" example for all students! well deserved!"
DDThanks, Mike!
1 year(s) ago
"Dennis is a student of the game, feels like he's always there training his ass off and eager to learn more! "
DDThanks, Yob. You rock!
1 year(s) ago
"I trained with him, beltnis verified"
DDThanks, Mariëtte!
1 year(s) ago
Videos 4
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Seminars, camps & workshops attended
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BJJ globetrotters Spring Camp 2026
Apr 13
Half guard seminar with Helio Soneca
Dec 2025
BJJ globetrotters Spring Camp 2025
Apr 2025
Thiago Abreu seminar on lasso guard sweeps
Oct 2024
Spar Wars
Jan 2024
