About Us | Mantle

About Us

Since 2010, Mantle has been working with industry-leading organisations to give their people the leadership edge.

What we believe in

At Mantle, we’re committed to working together with our clients to achieve the best possible leadership development outcomes. To do that, we focus on:

  • Impact: Making a real difference
  • Collaboration: Working as partners and making it easy
  • Being real: Focusing on practical solutions that work
  • Growth: Continuing to learn and adapt
  • Performance: Being tuned-in, responsive and at the top of our game

Our team

Our fantastic leadership development community is made up of experienced facilitators, learning designers and coaches, who focus on providing the very best experience for learners, whether working virtually or face to face.   We’re all passionate about enabling leaders to be the best versions of themselves and empowering them to thrive in today’s busy and ever-changing world.

Rachael Thomas

Rachael is passionate about helping others to connect, learn and grow at a time when effective digital learning has never been more important. An experienced coach, facilitator and leader, Rachael is passionate about partnering with others to get unstuck, and audaciously move towards their goals.

Roxy Pringle

Roxy is the administrative guru for the Mantle team, providing day to day backup for the Directorship.

She has a BA in Sociology and Criminology, and a varied background in administration, bookkeeping and events management giving her a vast range of skills and knowledge to impart. Give it to Roxy and it gets done!

Jon Dunning

Jon is an experienced people leader, facilitator and coach. Whether in a small team environment or a large, complex and diverse organisation, Jon looks for opportunities to translate the strategic into operational in order to meet our clients’ ultimate goals. His focus on developing sound partnerships with our clients is a key factor in the sustainable outcomes they achieve.

Saskia Clements

Saskia is passionate about unlocking potential in individuals and organisations. She is a highly respected facilitator, coach, and mentor. Saskia's positive and empathetic style allows her to challenge and encourage learners to harness insights and reach new levels of performance.

Mark Wirihana

Mark is a warm relationship builder and a very effective facilitator and designer. Throughout his life, he has been involved in Tikanga Maori and has been influenced by the initial Kingitanga to modern Maori leaders (Ngata, Carroll, Ratana and TePuea Herangi). Passionate about building bridges between cultures and encouraging broader perspectives Mark is forever developing new skills and capabilities.

Angus Swainston

An experienced executive and leader, Angus is passionate about growing deep connection and trust to empower teams to exceed expectations. Drawing on his long and varied international career, working in both small and large organisations, he has seen a lot of what work-life can throw at people. He is committed to bringing more happiness into the workplace and uses his open and empathetic style to coach and mentor our clients in professional and personal growth, guiding effective transformation for both individuals and teams.

Anton Ashcroft

Passionate about fostering great leaders, Anton has many years of experience facilitating both individuals and groups through the process of change, personal development and conflict resolution. With a Masters in Applied Psychology, one of his unique strengths is his ability to take complex ideas, such as the neuroscience principles that underpin our approach, and turn them into practical tools and techniques.

Kimble Vowless

Kimble is part of the Mantle leadership team and as a Director is responsible for ensuring Mantle continues to deliver the very best in leadership development. Kimble has been involved in learning and leadership development for over 20 years.  He has had an extensive corporate career, with his last role seeing him lead the capability and development team in one of NZ’s most prominent private corporate organisations for seven years. He was also involved in large-scale development and culture change projects. He is an experienced and confident learning designer, facilitator, and coach at all leadership levels with a passion for what Mantle does.

Ruth Donde

Ruth is passionate about leadership development, and the impact of personal and professional development on individuals, relationships and organisational outcomes. Her commitment to continuous learning is also applied to ensuring our own team’s capabilities are constantly evolving.

Denise Carter

Co-founder, Denise has more than 30 years’ experience in leading and developing people. Her career has seen her in roles ranging from an Officer in the armed forces, to senior group learning and development positions in some of the UK and New Zealand’s largest organisations. Her focus on relationships supports long-term partnerships with our clients, some of whom have been with us since we started.

Graham Hart

A founding Director of the business, Graham has more than twenty-five years’ experience working in operations, human resources and management consulting roles.  His relentless curiosity and creativity are two of the main reasons Mantle continues to grow its impact on the leadership world.

Kathryn Scordino

A passionate advocate for diversity in the leadership pipeline, Kathryn has a focus on empowering individuals to lead in their own authentic voice, resulting in meaningful change that positively impacts how work is done.  Kathryn brings a wealth of knowledge from around the globe and across industries strengthening her ability to guide people to thrive through leadership facilitation and coaching.

Kelly Samson

With experience working in complex, fast moving environments, Kelly brings a dynamic, challenging and motivating style combined with compassion to build leaders confidence and skills, and support growth.  Kelly has a diverse range of skills stemming from his own leadership roles in the military and corporate sectors in both NZ and the UK.  Kelly is an experienced facilitator and ICF qualified coach with a focus on NLP.

Melissa Bramley

Melissa brings a wealth of experience to the admin team, providing support in logistics and delivery and backing up Roxy in supporting both the Mantle team and our learners.   Melissa has an extensive background in the travel industry, having held varied roles including team leadership.  She understands the busy-ness and complexity of leaders' lives and delivers support with compassion.

Kerry Topp

Kerry's passion is leadership development with a cultural, Tangata Tiriti lens, focusing on nurturing relationships, upholding Te Tiriti o Waitangi principles and connecting people and technology for the benefit of businesses, religions and communities.  Kerry brings expertise in business strategy, executive coaching, team and culture development, conflict resolution, strategic portfolio management, strategic planning, programme governance and assurance, portfolio delivery, and business transformation, accumulated over his more than 25 years of senior leadership experience.


Ota Savaiinaea Aben

Ota Savaiinaea Aben

"The team at Mantle have been pivotal in helping my leadership team shift to a more empowered, inclusive, and performance driven culture. Their focus on not only the skills and tools to do that, but most importantly the mindset underpinning it, has enabled us to heighten engagement, accountability, and growth within all team members, both our leaders and team members.

Mantle brought a dedicated focus to truly understanding our needs through a consultative process that continued throughout our engagement with them.

As a result, the development and coaching given was focused, tailored specifically to our needs, and provided strong links to the wider MBIE organisation. I highly recommend them to any organisation that is seeking real behaviour change and growth in their leaders and overall performance."



Programme Participant

“I’ve witnessed well-meaning performance “feedback” having the unintended consequence of actually detracting from a team’s ability to reach its potential… I now have a better understanding of how to keep a team focussed on improving rather than just proving when reviewing performance.”

Tanya Harvey

Tanya Harvey
CEO Auckland Kindergarten Association

“You quickly get under the skin of the organisation and you offer leading edge thinking on development and applying neuroscience. Your services are practical and pragmatic not academic or heavy on theory. We now have more confident and engaged leaders and we are growing our leadership mind-set and opportunities. You were quickly able to add value up front and I like your flexibility and collegial approach.”

Stephanie Field

Stephanie Field
HR Manager

“Mantle established themselves as a key strategic partner, playing an integral role in a number of successful OD initiatives across both the NZ and Australian businesses.”

Jenni Coles

Jenni Coles
Ex Director, Bupa Care Services

We decided to use the services of Mantle because we liked how well you listened and got to the heart of our issues and understood our current reality. You have employed a partnership design methodology and successfully designed and implemented the programme. We now have leaders who have a vision and personal route map for self-improvement. We have increased performance in teams, change leadership and engagement.

The Leader

The Leader
Team Leader

I now think of myself as a leader and understand how I can influence our future at BCS.

Marina Dzepina

Marina Dzepina
ASB Organisational Development Specialist

“One of the benefits of using the leadership consulting services of Mantle is we now have leaders who have a vision and personal route map for self-improvement. You are very easy to work with and believe in partnership with your clients. Graham and Denise are constantly engaging on leading edge thinking and are very willing to share and explore new ideas in the field of leadership development.”

People Leaders

People Leaders

Thank you so much for facilitating a valuable growth experience.’ ‘Invaluable, fun, interactive and ‘real’ workshops.

Julia Wiegandt-Goude

Kirsty Grant

"Partnering with Mantle transformed our approach to leadership development. Their ability to understand our unique needs as an organisation, and deliver a customised programme has been exceptional. Our leaders are now better equipped to guide their teams with confidence and adaptability, creating a culture that is both supportive and results-driven. Mantle's expertise in creating dynamic, impactful learning experiences has made a significant difference for our staff and the animals we serve."