A principal-led team of specialists.
Behavioural scientists, immersion architects, executive coaches and truth-tellers, led by one advisor who stays accountable from first conversation to final evidence.
Between us we design experiences that transform high-potential talent into ready leaders, stand in the room with your stakeholders, and make sure what your investment achieved is measured independently.
Meet David
Building leaders who fulfil their potential. Forging teams that perform. Co-creating cultures that resonate.
I’m David Joshua, founder of Resonance Leadership Advisory. My work is about creating change – in strategy, culture and leadership – so your business and its people can reach their full potential.
Over a 20-year career, I’ve reported to international banking CEOs, led the sales team behind a 10x rise in global investment sales at Standard Bank, and built award-winning investment propositions. I understand the reality of what it takes to create change inside a corporate – not just from a theoretical lens, but from lived, practical experience too. My journey has taken me across the globe, working with diverse cultures and pioneering initiatives that spark real change.
Now, through Resonance Leadership Advisory, I advise CHROs, CPOs and CEOs on their strategy, culture and leadership, and build the leaders they need next through transformational programmes, immersions and executive coaching. I’m also associate faculty at Henley Business School, where delegates rate my flagship course 9.7 out of 10 on average, and a Penguin-published author.
My work is rooted in the wisdom of timeless principles, the rigour of modern behavioural science, and an understanding that the path that creates transformation in people and cultures is narrower and harder than the one most programmes offer – but it is walkable, with the right balance of guidance and challenge.
When I’m not in a boardroom or a business school, you’ll find me on a mountain or in the sea. It’s where I do my best thinking, and where I find the presence I bring to every client engagement.
“It’s difficult to distil into words the impact my time with David has had – professionally and personally. If you’re seeking personal mastery, look no further.”
Dudu Moloko
Group Head of Learning & Development · FirstRand Bank
Independent measurement
Contracted separately from our design and delivery team, so the verdict on your programme isn’t ours to give.
Deirdre Jensen is the founder and Managing Director of Game2Change, which we contract separately to measure whether every programme is producing the capability it was bought to produce.
A learning strategist with over twenty years in corporate learning, Deirdre brings objective measurement of behaviour shift, competency uplift and business impact – giving clients proof of value rather than proof of attendance, in a form their CFO can fund.
Game2Change works with major financial services, banking, retail and pharmaceutical organisations, and Deirdre has spent more than a decade designing and running large-scale capability programmes inside corporates.
Because she sits outside the design and delivery of our work, her findings hold up in the ExCo pack, and every engagement ends in a clear verdict: fix it, scale it or stop it.
Her work is grounded in a simple belief: programmes should be judged by what changed, not by who attended. If you can’t prove it, you can’t defend it.
The team you’ll work with
The experts behind the work.
Adam Gottlich is Resonance Leadership Advisory’s Immersion Architect, responsible for designing the experiential learning sequences inside every Accelerator.
An award-winning applied behavioural scientist, Adam brings over ten years of experience helping financial firms improve decisions, innovation and customer experience through behavioural science, predictive analytics and decision architecture.
Adam is also the founder of Nudge Labs. Previously he was Executive Head of Behavioural Science at Standard Bank Group, where he built the bank’s behavioural science capability, driving measurable growth, trust and customer journey improvements.
He holds an Honours in Cognitive Psychology from Wits, awarded cum laude, and lectures in Applied Behavioural Science at Henley Business School.
His work is grounded in a simple belief: great outcomes are the result of disciplined science, not guesswork. And if you can’t measure impact, it probably isn’t worth doing.
Estelle Baffoe is Resonance Leadership Advisory’s Programme Director, responsible for turning each accelerator’s design into six months that run on time, in the room and on the ground.
An Accelerator delivery specialist, Estelle brings more than twenty years of experience designing and delivering executive leadership programmes and experiential learning journeys across the globe.
At the Gordon Institute of Business Science (GIBS), she designed and managed flagship leadership programmes, including Executive Leadership Dialogues with heads of state. At Henley Business School , she led executive programme delivery and local and international immersions for corporate clients, and played a founding role in its Centre for Innovation, Creativity and Entrepreneurship.
Estelle is the founder of Basiq Blaque Consulting, an experiential events and programme management consultancy established in 2007.
Her work is grounded in a simple belief: design earns trust on paper, but delivery earns it in the room.
Expert-delivered continuity.
A common reason externally delivered programmes stall is simple: multiple stakeholders, diffuse accountability, and the team that pitched is not the team that delivers.
At Resonance Leadership Advisory, the advisor who scopes the work stays accountable for it, designs it, and is in the room when your ExCo hears the results. What that buys you is not only continuity. It is a partner who understands how your business succeeds, knows how to facilitate ExCo buy-in before it begins, and whose reputation depends on your talent actually stepping up – rather than simply attending.
Five questions to ask any succession partner – including us
The answers will tell you more than a credentials deck.
- Who will be in the room with your ExCo? Partner-led sales and associate-led delivery isn’t a failing of large firms – it’s their business model. Here, David runs every diagnostic himself, with a named team you can meet on this page.
- Who grades the result? If the people who designed the programme also measure it, you’re reading their opinion of their own work. Ours is measured by Game2Change, contracted separately from our design and delivery team.
- Whose standard are your leaders measured against? Most providers bring a model they already own. Ours is the one your ExCo sets in the room.
- What happens if it isn’t working? Here, you stop at the end of any stage, with nothing to settle.
- Will they tell you what you don’t want to hear? Corporate bureaucracy exists, in part, to protect the brand. When the principal is the brand, that constraint disappears.
When a large firm is the better choice
If you need the same programme running in thirty countries at once, or a hundred facilitators on call, a large firm will serve you better. If you want the person who designed the work in the room with your ExCo, and an independent verdict on what it achieved, talk to us.
Start with a conversation.
Twenty minutes on what your leadership bench looks like, what your strategy is about to ask of it, and how you want to prepare your talent to close the gap.
No deck and no pitch. Just a clear view of where your bench is today, and what succession readiness looks like from here.
