75%
of managers feel overwhelmed by growing responsibilities.
Source: GartnerExecutive coaching · Culture · Learning · Speaking
Cultures that perform under pressure.
Say no to
burnoutblamebusy nonsensepolite dysfunction
We help senior leaders, teams and HR partners build inclusive, high-performing cultures, so people make clear decisions under pressure without sacrificing trust, energy or inclusion.
Vanessa BelleauFounder · Executive coach · Speaker
+90%more confident leaderspost-engagement feedback
Trusted by leaders at
What overwhelmed senior leaders call us in to fix
Most leadership problems aren’t skill problems. They’re pressure problems. Decisions stall. Energy drains. Conversations go underground. We name what others avoid, and build cultures where people perform and thrive.
The data does not lie
The cost of leaving performance to chance.
The gaps can be bridged by creating cultures where people feel seen, valued and empowered to innovate, share ideas and do their best work. Better engagement means better results. We do this every day.
36%
is all. That’s the share of HR leaders who believe their programmes prepare leaders for future challenges.
Source: Gartner21%
greater profitability for organisations with highly engaged employees.
Source: GallupFind your way in
Where are you sitting right now?
Pick the seat closest to yours and we’ll show you exactly how we help. No guesswork, no generic packages.
Stabilise performance. Strengthen execution.
Sounds familiar?
- Decision-making is slowing down
- Leaders are stretched or exhausted
- Culture is quietly undermining execution
- Change needs to land without damage
How we help
- Culture audits, resets and transformation partnerships
- Leadership team and senior leader coaching
- Learning that builds capability that lasts
You carry a lot. You shouldn’t carry it alone.
Sounds familiar?
- Expected to drive culture change and make it look effortless
- Balancing long-term strategy with daily firefighting
- Training that never leaves the room
How we help
- Co-created, inclusive people strategy
- Workshops people want to attend again and again
- Confidential coaching for HR leaders
- Conflict resolution and mediation
Lead with clarity, presence and authority.
Sounds familiar?
- Pulled in too many directions
- Decision fatigue, hesitation or imposter syndrome
- Stepping up into a bigger role
- Boundaries and people complexity
How we help
- Focused 1:1 executive coaching, from three months
- Strengthscope® and EQ-i 2.0 psychometrics
- Support between sessions, so you are never alone
Moments that land, and lead to action.
Sounds familiar?
- Audiences that listen politely, then forget
- Panels that lack depth or direction
- Events that don’t drive follow-through
How we help
- Keynotes rooted in behaviour shift
- Purposeful panel moderation and emceeing
- Strategic facilitation and event design
- TEDx speaker with proven stage energy
Our services
Four ways we move performance.
Delivered differently for organisations and individuals. Every engagement is tailored, never templated.
Compare all services01 / 04Organisations & teams
Culture & operating effectiveness
Design cultures that reduce friction, clarify accountability and support faster execution.
- Identify the real barriers to performance
- Align behaviours with strategy
- Strengthen trust and psychological safety
- Embed ways of working that stick
Best forOrganisations navigating growth, change, disengagement or hidden performance drag. Explore culture work
02 / 04Leaders & leadership teams
Executive & leadership coaching
Targeted coaching for leaders who need clarity, confidence and presence in complex environments.
- 1:1 executive coaching
- Leadership team coaching
- High-potential and succession support
- Short, outcome-focused coaching sprints
Best forSenior leaders, SLTs, founders and organisations investing in leadership readiness. Explore coaching
03 / 04Managers & teams
Practical workplace learning
Leadership learning that changes behaviour, not just mindset, and never stays in the room.
- Decision-making under pressure
- Communication and conflict capability
- Inclusive high-performance behaviours
- Resilience and energy management
Best forOrganisations that want skills leaders can apply the very next day. Explore learning
04 / 04Events & offsites
Speaking, facilitation & strategic sessions
Insight-led keynotes and facilitated sessions that reset focus, challenge assumptions and move people to action.
- Keynotes and TEDx-calibre talks
- Leadership offsites
- Strategy and culture sessions
- Facilitated conversations on difficult topics
Best forMoments that matter: launches, resets, transitions and critical conversations. Explore speaking
Our difference
Direct. Warm. Grounded.
‘Outstanding’, ‘inspirational’, ‘instrumental’, ‘incredible’. Our clients’ words, not ours. Yet, we agree. We strengthen leadership behaviour, emotional maturity and ways of working so everyone can execute with clarity, confidence and consistency.
We want you to feel
Empowered
Assertive
Inspired
Challenged
Co-created, never copy-pasted
Deep listening, positive-psychology insight and a flexible approach that meets you where you are and takes you where you want to go.
Global experience, personal touch
World-renowned brands on the client list, and the same care and commitment for every relationship.
Impact that lasts
High performance is about accountability and sustainability. We design for teams that thrive tomorrow, not just today.
Results, whatever your size
Micro business, scale-up, charity or global group: tailored solutions with integrity and long-term cultural impact.
Impact
30,000+ employees and senior leaders inspired so far.
Since 2019, across luxury, retail, FMCG, real estate, tech scale-ups and charities. Here is what clients consistently tell us after working together.
+90%
of leaders report increased confidence and clarity in their role.
8 in 10
participants rate our insights as immediately applicable to their day-to-day work.
+85%
of clients say we enabled more open, constructive conversations in their teams.
75%
of clients come back to us for other projects, teams, functions or geographies.
Based on post-engagement feedback across coaching, workshops and leadership programmes.
Meet the founder
Led by experience. Grounded in reality.
“No boxes, no barriers, no labels.”
High Fifteen was founded in 2019 by Vanessa Belleau, executive coach and culture consultant with over 18 years’ experience across leadership development, coaching and culture design.
She is known for naming what others avoid, creating psychological safety without lowering standards and helping leaders perform without self-sacrifice.
- PreviouslyConsultancy EMEA Director at WGSN, the global trend forecaster
- AccreditedMaster Practitioner, Strengthscope® · Certified EQ-i 2.0 & EQ 360
- On stageTEDxBeckenham speaker, keynote host and gender equity summit emcee
- Off dutyPainter, featured at the Royal Watercolour Society Open
Client stories
Real change. Real results.
Sony Music
75% → <10%negative team-culture sentiment, in eight months
A full cultural transformation that took 15 talented people from ‘storming’ to consistently ‘performing’.
Levi’s HQ
120senior women, one standing ovation
A keynote that became a workshop series and two years as emcee of their gender equity summit.
Gymshark
2 yearsbuilding belonging, from founder to HR team
Described by the Chief Brand Officer as a ‘guiding light’ in showing up for their people.
Global beauty & luxury group
More stories
400+employees a year, 45+ workshops, 5/5 usefulness
An inclusive high performance L&D programme, now three years and counting.
Nike, Mango, PUIG, MFK and more.
See how we help leaders and teams perform better.
In their words
Clients don’t come for theory.
They come when something important is at risk. Here’s what changed.
01 / 06
Vanessa has been and continues to be a key stakeholder in making our teams better teams inside out. A real fresh and inspirational approach. We always love having you by our side.
Managing Director, UK, Ireland & South AfricaLouis Vuitton
There’s a marked difference in the way the business has been operating before and after Vanessa’s influence. I feel more confident than ever to be the CEO that Better Nature needs and deserves.
CEOBetter Nature
I can honestly say that I wouldn’t be the leader I am today without her guidance. Working with Vanessa over the past 12 months has been nothing short of transformative.
Anna Jewsbury, Artistic Director & FounderCompleted Works
Vanessa is energetic, fun, intelligent and a strategic coach who has added significant value to my leadership toolkit.
Global Director, Diversity & InclusionCBRE
I had high hopes for the session and you exceeded those for sure. The content has definitely evoked something in the team. The journey really starts here.
Regional Manager, UK & IrelandMango
If you have seen one of her famous presentations, you will never forget it your whole life, and you definitely want to see more from her.
Managing DirectorColoro, The Color Code
Watch · TEDxBeckenham
The art of choosing joy.
How to get through tough times with creativity, self-love and joy. Vanessa’s TEDx talk on why choosing joy is a daily act of resilience, and the same energy she brings to every room.
The Pressure Check · 2 minutes
How is your team really doing?
Six honest questions built on the patterns Vanessa sees in leaders every week. You get a score, a plain-English read on what is going on, and where we would start.
- No email needed to see your result
- Your answers stay in your browser
- Optional: send it to Vanessa to shape your first conversation
01 / 06
How do important decisions get made on your team right now?
Thriving, surviving or suffering: how would most of your people describe their week?
When something is going wrong, how early does someone say so?
How confident are you that everyone can bring their full voice to work?
How stretched are your senior leaders?
Do your stated values match what people actually experience?
Pick the answer closest to today.
The Journal
Stay inspired. Stay informed.
How much of yourself do you bring to work every day?
We talk a lot about skills, motivation, accountability and productivity. Yet there is another question leaders and managers need to ask.
You made a mistake at work. Now what?
At some point in your career, you are going to get something wrong. Welcome to being human. The real question is what happens next.
Your reputation is being built in the tiny moments
By the time you get to the big moment, people already have a view of you, shaped by hundreds of tiny interactions you barely noticed.
Straight talk
Are we right for each other?
We do our best work with people who are ready for honest challenge. Here is how to tell.
We’re a great fit if…
- You lead, or support, senior leaders and teams where performance really matters
- Something important is at risk: delivery, retention, trust or reputation
- You want direct, warm challenge, not flattery or theory
- You are ready to act on what we uncover together
- You see inclusion and performance as the same conversation
We’re probably not for you if…
- You want an off-the-shelf session to tick a box
- You expect us to ‘fix’ people without leadership involvement
- You are looking for quick wins with no behaviour change
- There is no time or appetite to work between sessions