Developmental leadership

Psychologically safe and powerful leadership

Coaching for teams, managers and professionals who wish to take an active role and work together to create a psychologically safe working environment where everyone can excel and fulfil their potential.

“Marianne asked me questions I’d never been asked before.”

Where would you like to start?

Choose the programme that suits where you are now.

Individual coaching for professionals

You know exactly what you’re doing in terms of content, but deep down it never quite feels enough. Together, we’ll identify the patterns that are holding you back, and we’ll break through them.

Individual coaching for managers

Leadership involves more than just focusing on results. You work to foster a sense of safety within your team and to strengthen your own resilience, so that people feel able to speak their minds rather than hold back.

Team coaching

In many teams, the real conversation remains unspoken. We bring to the surface what is really going on and build a way of working together that allows room for doubt and dissent.

Overcome uncertainty and psychological unsafety in your work

Aprezo helps managers, professionals and teams to break through psychological insecurity, tension and ingrained patterns in the workplace. When people do not feel seen, heard or valued, and when trust is lacking, they hold back. They do not speak up and do not participate as equals. This drains energy, hinders innovation and collaboration, and consequently stifles results and growth.

Our programmes bring to light what is happening beneath the surface, and we work to raise awareness so that people learn to recognise these patterns for themselves. And how they wish to interact with one another in their collaboration to foster greater clarity, trust and accountability. So that people stand firm, speak their minds fearlessly and work together to build a working environment where safety, openness and results go hand in hand.

In practice

Undermined. Rebuilt.

A D-level manager in the pharmaceutical industry was off work for months with severe stress-related symptoms. Systematically undermined by a new line manager, their job satisfaction and self-esteem had vanished like snow in the sun. Together, we gained a clear understanding of their values, motivations, talents and qualities, using tools from Co-Active coaching and ORSC, amongst others. Their self-confidence grew visibly. Doubt gave way to clarity about what this manager truly has to offer. A conscious decision to seek a new working environment followed, and this remained within the pharmaceutical sector.

From self-doubt to confident leadership

A healthcare scientist working within a complex political landscape, facing a demanding role and a strong sense of uncertainty. Thought patterns and behaviour regularly worked against them. Using, amongst other things, the Leadership Circle Profile in combination with Positive Intelligence, Neurotransformational Coaching and constellations, we worked on their professional and personal effectiveness. Partly through gaining awareness of the origins and impact of self-sabotaging patterns, this client tackled them at their root. Core values and personal impact became clearly defined. Leadership effectiveness improved significantly. This researcher is now firmly in control and has been appointed as a professor.

Taking back control

A healthcare coordinator was struggling with delegation, unclear roles and communication that was causing resistance within the team. It was exhausting and frustrating, as agreements made were not being honoured. Together, we identified self-sabotaging thoughts, toxic communication patterns and the individual’s own role, using tools from, amongst others, Co-Active coaching, Positive Intelligence and ORSC. ‘Immunity to Change’ revealed what was unconsciously holding things back. Situational leadership provided a framework for tailoring the approach to each colleague and each situation. The result: greater control, more effective communication and a coordinator who is firmly and clearly established in their own role.

About Marianne van Oosterhout

I support ambitious professionals and managers in healthcare, science and biotech who find themselves stuck due to uncertainty, a lack of psychological safety or ineffective leadership patterns. With over twenty years’ experience within healthcare organisations and working with scientists, I understand the pressures and complexities of these sectors from the inside.

As an internationally certified coach (PCC, ICF), I have clocked up more than 2,300 coaching hours and have supported hundreds of clients. I work with tools such as the Leadership Circle Profile®, Positive Intelligence® and stress and burnout coaching methodologies. This helps to quickly identify patterns, enabling us to work specifically towards sustainable behavioural change.

Clients describe my coaching as warm and incisive, delivering lasting results in terms of self-confidence, leadership and impact.

Testimonials

4 / 5

7 reviews

Marianne is a very pleasant and knowledgeable coach, with whom I feel very much at ease. I’ve been seeing her for a number of years now and am very satisfied with the way she coaches me. She connects well with who I am and with my questions, and she challenges me to reflect and take action. I’ve learnt a great deal from her over the past few years.

Judith Uiterwijk

After a hectic period at work where I was thoroughly criticised by a director, I lost my self-esteem. Thanks to Marianne’s support, I managed to get back on my feet and learnt to stand up for myself better. I was also inspired by an excellent leadership training course.

Marcel van den Eng

Marianne is a warm and empathetic coach who holds up a mirror to you in a positive way. With her, you feel safe and understood, even when confronted with deeper, often unconscious patterns. She guides you with care to become aware of these patterns and helps you let go of habits that aren’t working. Thanks to the full programme I completed with her, I have made noticeable and lasting progress in my mental health.

Frank de Jongh, doctor

I’m glad I chose Marianne and followed my intuition. I’m most grateful for her recommending the book *Positive Intelligence* by Shirzad Chamine. Inspired by this book, I started the online Mental Vitality Programme, and my coach, Marianne, guided me through it. I am also very satisfied with the way she helped me gain insight into my own strengths and qualities. I also really appreciated that Marianne took the initiative to check in with me from time to time to see how I was getting on and also drew my attention to practical matters.

C.E.

Thanks to our fruitful conversations, I soon realised that I’d taken on too much (both at work and in my personal life). It turned out I was suffering from burnout. Marianne was a great help to me during this difficult time. And the great thing is that Marianne is also very adept at adapting and can intuitively sense what is important and necessary at any given moment. Marianne has given me many insights on a number of points, which I find very valuable and which can bring me even closer to my goals in the future.

M.S.

Marianne’s team coaching has made a very positive contribution to team spirit. Team members are more aware of their communication patterns, and communication amongst the team has improved significantly. We now engage in much more dialogue with one another and are working constructively to improve our collaboration.

CK, Director

I’ve been seeing Marianne for years, and that really says it all. She has taught me to reflect: to pause where I used to rush straight through, and to look at situations through different eyes. In quiet periods, she gets me thinking; in challenging times, she brings calm.

What makes Marianne special is her combination of genuine commitment and professional expertise. She listens without judgement, asks exactly the right questions and provides practical tools that you can really put to use. Even between sessions, she continues to think alongside me and shows genuine empathy.

Over the years, I’ve developed thanks to our collaboration, both personally and professionally. I can wholeheartedly recommend Marianne to anyone who wants to grow further, reflect and take concrete action themselves. It’s simply a matter of taking a good, long look in the mirror with someone who guides you through the process with warmth and expertise!

Gert Kornet

“I’m so glad I found Marianne at a time when I really wasn’t doing well. I was incredibly tired, couldn’t think clearly any more and didn’t really know how to carry on. Things were very hectic at work and my private life was on autopilot. I just didn’t know what to do anymore. I confided in Marianne and she never betrayed that trust. She guided me in very small steps. At first, I really didn’t know the answers to her questions; my head was too full to think properly, but bit by bit, space opened up to consider how certain things needed to change. Both at work and in my own mind. Certain thoughts and habits have become so ingrained, yet sometimes they’re not good for you. Marianne confronted me with this and helped me realise it.

I really wanted to get ‘better’ again, so I took this programme very seriously – and it worked! Creating a new daily routine, dealing with thoughts differently, building in moments of calm, setting and maintaining boundaries, finding and drawing on my inner leader – I could list so many things that are now going so much better and bring me peace of mind. Now that I’ve had a chance to reflect on it, I realise just how much progress I’ve made, and I’m genuinely so happy about that! I’ve now completed my programme, but I know I can always turn to Marianne, and that’s a really lovely and reassuring feeling!

Melanie Clemens

I have taken part in many different self-empowerment courses, but I have never had such a life-changing experience as with Marianne!
I deliberately call it an experience as it goes far beyond coaching. The sessions include so much more than I had expected when I signed up for her coaching programme. With her enthusiasm, professional attitude and a sort of ‘superwoman’ radar, she always asks the right questions to establish clear goals for each session, no matter what area it relates to. She combines kindness with firmness in a remarkable way to achieve the best results, even without knowing in advance what those results will be or which direction to take.

Karin Oversloot-van der Zel

Coaching with Marianne van Oosterhout is not just an investment in yourself; it is also a gift to yourself. Sessions are always a combination of intensive work and moments of calm.

Intensive, because coaching with Marianne involves a – sometimes profound – confrontation with conscious and subconscious patterns and beliefs, exploring where they originate and how they influence you. It also involves hard work to internalise new patterns. This simply cannot be achieved without a bit of trial and error.

Finding peace, because Marianne creates an atmosphere in which you are allowed to be yourself, with all your quirks and struggles, and can focus on what you need at that specific moment to continue growing.
The reason this can coexist within coaching sessions is that Marianne combines thorough professionalism with a high degree of personal commitment, which extends beyond the sessions themselves.

Coaching with Marianne is therefore the most valuable gift you can give yourself.

JMG

Although I am a highly qualified coach and mentor myself, I have benefited greatly from Marianne’s intuitive and compassionate coaching and mentoring on a number of occasions over the past few years.
I have no hesitation in highly recommending Marianne for her insights, particularly in leadership and personal development. You’ll be glad you chose Marianne’s support.

Linda Ambrose

For professionals and managers

Would you like to feel confident and grounded in your role again?

Do you doubt yourself, or find yourself stuck in patterns you can’t break?
Aprezo helps you see what’s going on beneath the surface and gives you practical tools to speak your mind, set boundaries and work with impact.

Knowledge base

The two types of safety that every team needs

11 September 2026

Psychological safety and social safety: the difference, the signs to look out for and the first steps towards a truly safe working environment....

You don’t speak your mind

19 August 2026

Half past eight in the morning. You’re reading a prescription and something doesn’t seem right. The dosage is different from what you’re used to, or something’s missing...