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News4 October 20251 min readLees in het Nederlands

From customer to colleague: Joost Wammes becomes Customer Success Manager

I spoke to four trainers. Three of them were mostly focused on their own offering. But with Klaas it was different.

From customer to colleague: Joost Wammes becomes Customer Success Manager

In May I, Joost, was looking for a sales trainer. Not just any trainer, but someone who really listened. Someone who understood what I needed.

I spoke to four trainers. Three of them were mostly focused on their own offering. But with Klaas it was different.

I found him through Google, was struck by the professionalism of his website and booked a call. From the very first moment it clicked: his energy, his no-nonsense approach and his genuine interest made an immediate impression.

During the programme my enthusiasm grew, not only for sales but also for Klaas's mission: helping companies turn their customers into fans.

From now on I am stepping in as Customer Success Manager. An adventure that gives me an enormous amount of energy.

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Klaas Kroezen
About the author

Klaas Kroezen is an entrepreneur who trains, coaches and speaks. He wrote the #1 Dutch bestseller Sales, Honest & Relaxed and the new book Van klant naar fan (From customer to fan, November 2026). After 25+ years in sales with his own international market research firm, he helps organisations adopt the From customer to fan mindset: selling honestly and relaxed, and turning customers into fans with the whole team.

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