Teams that
truly
work together
Most problems in the workplace are communication problems. I know that after 23 years in front of groups, at more than 200 organisations. No grey theory. Just getting to work.
There’s friction, but nobody says it
In most teams the problem isn’t unwillingness. It’s what goes unsaid.
- Meetings where everyone nods, and the real conversation starts in the hallway.
- Feedback that travels via detours instead of directly.
- Two colleagues who structurally misunderstand each other.
- A team member disengaging, and nobody knows exactly why.
- A manager who solves everything content-wise, but postpones the conversation about behaviour.
Recognise this? Good news: it’s not a character problem, it’s a communication pattern. And patterns can be trained.
Discuss your situation
More than
a trainer
My name is Willem Slinger. As a trainer and coach I work with teams and leaders who want to grow in collaboration, communication or leadership. I ask the questions everyone thinks but nobody says out loud.
Alongside my work as a trainer, I coach hockey. That experience comes with me: it is always about the team, never about the individual alone. I use DISC and other methods as a tool, never as a goal in itself.
What drives me is simple: the moment someone sees something they didn't see before. That moment changes conversations, collaboration and sometimes careers.
I work from Haarlem across the entire Randstad region, and I am also available internationally. The approach works everywhere: different language, same patterns.
The offer
Tailored team training
Your team, your situation. We work with real patterns and real conversations. No theory that disappears into a drawer.
Schedule a call →Communication & Collaboration
How do you give feedback without it feeling like an attack? How do you really listen? How do you say what you think without ruining the atmosphere? Those are the questions we get to work on.
Schedule a call →Leadership development
Good leadership starts with knowing yourself. What drives you? What blocks you? And how do you influence others without realising it? That is what you discover in this trajectory.
Schedule a call →1-on-1 Coaching
Sometimes you don’t need a training but someone who holds up a mirror. Someone who asks the follow-up questions and watches along. That is what I do in a 1-on-1 trajectory.
Schedule a call →Training as a facilitator
Do you work for an L&D agency or training platform and are you looking for an experienced facilitator? I am flexibly deployable and know how to adapt to any context, including international ones.
Schedule a call →Custom training programme
No ready-made package. I build something that fits your question, your language and your team. From intake to evaluation.
Request a proposal →The approach
Every collaboration is different. Yet there is always one line: first listen well, then build something that fits, then get to work together.
We start with a conversation. I want to know what is really going on, not what's on paper. No assumptions.
Based on the intake I build a programme that fits your team, context and objectives. Including behavioural profiles where relevant.
Energetic sessions with real situations from your team. No role-plays nobody believes in, but exercises that open something up.
Afterwards we look together at what has stuck. Because a training only succeeds if you still notice it a month later.
What does it cost?
I believe in being open about money. Below you can see what a collaboration typically costs. For a tailored quote, just get in touch.
Per session of 3 hours. Includes facilitation and materials. Preparation and customisation are charged separately.
- Communication & collaboration
- Leadership development
- Team building
Complete individual programme including DISC report (€150), intake, DISC debrief and follow-up coaching (3 sessions).
- Intake conversation (45-60 min)
- DISC questionnaire & report
- Individual debrief (1 hour)
- Follow-up coaching on action points
Individual coaching session of 3 hours. Programmes of 4-6 sessions available at adjusted rates.
- Leadership & personal growth
- Communication & behaviour change
- On location or online
All rates exclude VAT. Travel costs outside Haarlem are €0.25 per km return. Preparation and intake are discussed separately. For larger programmes we'll always find something that fits. Just get in touch.
What others say
Willem's training genuinely brought our team closer together. We understand each other's drives so much better now and you notice it every day in how we work together. A lasting investment.
Energetic, to the point and always relevant. Willem knows how to bring a group along without losing depth.
We asked for a tailored approach and got more than that. Willem actively thought along and delivered a programme that truly fitted our situation.
The sporting mindset Willem brings makes his sessions different. Direct, practical and with a sharp eye for group dynamics.
Do it yourself. Now.
These are tools I use in my own training sessions. After the training you get access, so what you discovered doesn't disappear on the drive home.
Request access
24 questions. You immediately see how you naturally show up in the game.
Start →6 steps to put on paper how you work. And share it with your team.
Start →Where do you sit on Erin Meyer's 8 cultural scales? Compare with colleagues and see where friction might arise.
Start →Add team members and instantly see team dynamics, balance and blind spots.
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Start →Discover your core qualities, pitfalls, challenges and allergies using the Ofman model.
Start →Frequently asked questions
Is your question not here? Just message or email me, I respond quickly.
Do I need to know exactly what our team needs?
No. Most clients don’t know exactly, and that’s fine. We plan a 30-minute conversation, I ask the questions, and together we pinpoint what’s going on. Only then do I write a proposal.
What does a training cost?
A half-day team training (3 hours) starts at €975 excluding VAT, including facilitation and materials. A complete individual DISC programme is indicatively €1,100 per participant. All rates are right here on this site, I believe in being open about money.
Our team isn’t waiting for “yet another training”. Will this even work?
Those teams are often the most fun to work with. Scepticism usually means previous trainings had too much theory and too little practice. That’s why I work without role-plays nobody believes in, using real situations from your own team. Often the biggest sceptic is the most active participant after an hour.
Isn’t DISC just putting people in boxes?
If you use it wrong, yes. A DISC profile isn’t a label but a conversation starter: it gives a team language to talk about behaviour. I use DISC and other methods as a tool, never as a goal in itself. The conversation that follows is what it’s really about.
Where do you work and is online possible?
I work from Haarlem across the entire Randstad, and I’m also available beyond that and internationally. Trainings and coaching can be on location or online. Travel costs outside Haarlem are €0.25 per kilometre return.
Can a training be in English?
Yes. I regularly train international teams, from Dutch organisations with English-speaking colleagues to teams abroad. The approach works everywhere: different language, same patterns.
How long does a programme take?
That depends on the question. A single team training is a half-day of 3 hours. A DISC programme includes an intake, the questionnaire, an individual debrief and follow-up coaching. Coaching programmes are usually 4 to 6 sessions. The proposal always states exactly what you get.
How do I know it worked?
Afterwards we evaluate together what has stuck and what still needs attention. My bar: a training only succeeded if you still notice it a month later in how the team works. If not, that’s worth a conversation, that’s part of the deal.
Let's get in touch
Send a message, WhatsApp me, or book a conversation straight into my calendar. I respond quickly. I promise.