Contact - Hans de Graaf - Decision Making Speaker

Brainful Decisions ...
Better & Faster
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We love to get in touch with you!

Our general e-mail address is But feel free to e-mail Hans ( directly.

You can also call us at +31(0)655772908 (Europe) or (424)644-6080 (USA).

In case you want to visit us, our office adress is:

Brain Tweaker
Afrikaweg 53
Assen, 9407TP
The Netherlands (Europe)
If you're into snail mail, our mailbox is eagerly awaiting messages:

Brain Tweaker
Postbox 50.000
Assen, 9400LA
The Netherlands (Europe)

Brain Tweaker is a tradename and part of Dalanca BV.
Dutch chamber of Commerce (KvK): 24185426
VATnr.:   NL851297079B01
USA EIN-number: 98-1066202

Accountnr. at ABNAMRO Bank (Assen): NL64 ABNA 0480 1087 65

Contact form

Through this form, you can tell me (almost) anything. Please let me know if you have any suggestions for my website, my keynotes or my products.

If you want to book me, you can also use this form.

In any case, I will contact you as soon as I read it!

Phone +31 655 77 29 08
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