“Mari hasn’t just changed my life she has helped me reclaim it. ”
Explore by area of work
Individuals and leaders
Peter Simmonds
VP and GM | SaaS | London
“Mari has been my coach for approximately 1 year, and I can honestly say that Mari changed my life. I engaged with her to continue my career development, and help me overcome challenges that we all face at work. Little did I know that the executive coaching that Mari provided would have such a profound impact on my life as a whole. She had the power to get beneath the surface like no one has done before and understand the core reasons why I do what I do, and why I react in certain ways. There were times during and after coaching that I felt like a door that had been locked for years was being opened, and a new level of me being released.
The impact of Mari's work with me has been staggering and I will always be so grateful. With Mari's coaching I have seen things in a very different light and it has allowed me to be my true authentic self like never before.
Mari is a true professional at all times and has the ability to truly get to the core issues at hand. I will work with Mari again as I continue to grow and I 100% recommend Mari if you are seeking leadership or life coaching.”
LeAnn Burkholder
Business owner | Business Management | Carolina
“I worked with Mari over a period of 9 months. Our work together played a key role in my professional and personal growth.
Her tailored advice and strategies have helped me develop a deeper understanding of my own leadership style, communicate with confidence, move forward with tough decisions that needed to be made, and build trust with and among team members in the midst of a critical season.
Mari's coaching has had a profound impact on my personal well-being. I now feel a sense of peace and self-assurance that I hadn't experienced before. Her approach not only focused on professional development but also encouraged introspection and self-awareness. Through her guidance, I've gained greater confidence in my skills and expertise, which has positively influenced my career.
Mari Williams is a dedicated, insightful, and empathetic business coach. Her ability to provide guidance and support extends beyond the professional realm, making her a holistic coach, and exactly what I needed in both my career and personal development.
If you are in need of a transformative coaching experience you are at the right place!
Gannon Dudlar
“I began working with Mari over a year ago. What a transformative experience! I was in a real low spot in my life personally. I’ve never had any mental health issues, but felt like I was not reaching my potential. I was not sure what was holding me back.
Mari helped me uncover my emotional blind spots and address them in a pragmatic way leading to more fulfilling relationships with family, friends and co-workers. She's helped me elevate my meaningful interactions with all of my community. She's given me the tools to help me identify what is important to me and how to build a more fulfilling life. Thank you Mari!!”
Emergency Doctor | Florida
Debora Silva
Healthcare Executive | Health | Los Angeles
“As a healthcare leader I am expected to drive change. However, I got to a point where everything I was doing felt like rolling a cube instead of a cylinder and I couldn’t figure out why. Mari's straight forward and practical approach helped me rethink my purpose, resolve old and unnecessary baggage and confidently step into the person I am, and will become.
Mari is an expert in the field of leadership and has the amazing to simplify what we often complicate. I appreciated her tips, suggestions and more importantly, challenges to think differently.
Thank you Mari, I have all the cylinders rolling.”
Angus Hone
CEO, CFO, NED
Business Growth Advisor | Technology businesses | UK
“Mari is an exceptional leadership coach.
What began as an informal conversation over coffee, evolved into a focused series of sessions that helped me navigate an important transition in role, and purpose.
She brings a rare blend of intelligence, clarity, and practical guidance. Her insights have had a lasting impact and they continue to help me maintain focus on what truly matters as I move forward.”
HR, People directors and C-Suite partnerships
“Mari brings value across all areas of our firm, there isn’t something I have discussed with her that she couldn’t help with, or advise on.
She helps leaders move forward if they are stuck in their personal lives, careers, or both. She understands them, and their blocks from something else in their life. The emotional side has been huge.
We have seen people really struggling for a number of different reasons, to go on and achieve promotion within the firm.”
Hannah Roman
People Director | Property Management | Cambridge
“Broaching personal difficulties with colleagues who are obviously suffering is never easy. Knowing what to do for the best in such situations isn’t always apparent. But operating in the service industry, our company IS its staff, and their wellbeing and welfare is a fundamental concern.
Offering an introduction to Mari to one of my team for confidential sessions has changed their life. Mari has enabled them to meet their challenges head-on, see things clearly, and in a new light.
I am positive that we would have lost a much valued employee had we not made the introduction to Mari.”
Neil Robinson
CEO | Property Tech | Cambridge
Teams and boards
“My law firm began working with Mari Williams in the beginning of 2024. Our leadership team was in the depths of conflict, mistrust, and complete failure of communication. We sought Mari’s expertise to navigate our high-conflict situations and foster genuine cohesion. Her approach was nothing short of transformative.
Mari introduced us to communication tools and helped us address personal traumas, triggers, and underlying tensions that were holding us back. She created a safe space for honest dialogue, allowing us to uncover the root causes of conflict and develop deeper empathy and understanding within our team.
Through Mari’s guidance, we not only resolved long-standing issues but also built a foundation of trust, clarity, and collaboration that has strengthened our leadership and organization. This work wasn’t easy - it required vulnerability and commitment - but the results were extraordinary.
If you’re seeking to create a cohesive, high-performing team while addressing the personal and emotional challenges that arise in leadership, Mari is the expert you need. Her ability to transform conflict into growth is unparalleled.”
Kelly Bozeman
Chief Strategy Officer | Law | Texas
“I was wrong.
And to be clear -I really didn’t want to do this. I was convinced it wasn’t for me.
As someone who doesn’t enjoy admitting those three words, I’ll gladly say them now: I was wrong. I absolutely needed this, and it was exactly what I needed.
I was leading a successful, high‑performing team, responsible for significant investor funds. The business was pleased - but wanted more. My team was ambitious and capable, but needed my support. And at home, I wanted to be a fully present husband and parent, but I was struggling to switch off. I wasn’t happy, and it showed. Not in a tyrannical, unapproachable way (well… maybe just a touch), but more along the lines of: “If I ask Tim one more question, his head might actually pop.”
So time with someone called Mari Williams was nowhere near my priority list. In fact, it was exactly what I thought I should avoid.
Did I mention I was wrong?
This testimonial could just as easily have been written by my family or colleagues, because the time invested with Mari has positively influenced every aspect of my life. It has been invaluable.
Did it require time and effort at a point when I felt busy and overwhelmed? Yes.
Did it lead to feeling better, being more productive, and offering better support to my family, my colleagues, and my clients? Absolutely.
I’m genuinely grateful to Mari for her support and insight, and to my employer for giving me the opportunity. It has made a meaningful and lasting difference.
Tim Barratt
Partner | Forestry | Scotland
Conflict Mediation
An example of the outcomes of mediation
“While working as Food and Beverage Manager for an independent hotel group in Central London, I ran into difficulties working alongside the Executive Chef.
He had been introduced into the business after me and his responsibilities chipped into my original remit. To make things worse, we were both clearly pulling in different directions. Soon enough the lack of distinct leadership and miscommunications at every level of the organisation were grinding our daily work to a halt.
Mari Williams was brought in to mediate. Firstly we saw her separately and then together. Mari has a way of creating an atmosphere of trust and respect even amongst the fiercest rivals. We were both able to communicate our differences clearly, and even some more embarrassing deep rooted dislikes until eventually there was nothing left unsaid between the two of us.
We then put a work-frame in place to ensure mutual open communication continued beyond the mediation process and helped us find a way to leave the room ready to work together again.
Mari’s contribution to the reestablishment of agreeable working conditions within the team was of the utmost importance to business, yet personally, I felt it had gone a long way in helping me understand some of my own challenges in communication and interactions with other people in my private and professional spheres, thus making an important contribution to my personal development. I have recommended her services to other businesses since.”
Barak Peled
Managing Partner | Venture Capital | Private Office | London
A private conversation
If you're navigating complex decisions, pressure or challenges across leadership, teams, boards or life, a private conversation can help clarify what comes next.
CO-FOUNDERS
The relationship between founders often sits at the centre of a company’s success. As the business grows and decisions become more complex, that partnership requires deliberate care, honest conversation and sometimes structured resolution.
Explore how this work helps co-founders protect the partnership and move the company forward.
TEAMS AND BOARDS
When leadership teams or boards operate under pressure, tension can affect decision-making, profitability, relationships and the direction of the organisation.
Discover how this work helps senior teams resolve complexity, strengthen trust and lead effectively together.
INDIVIDUAL LEADERS
Leadership at senior levels carries responsibility, visibility and constant decision-making, often leaving little space to think clearly about your own life within it.
Explore how this work helps leaders regain clarity, resolve pressure and lead with strength and perspective.