Kimberly Kay has spent over 15 years working across human rights movements, using the power of storytelling, technology, and community-building to create campaigns that shift culture, change laws, and save lives.
Having amplified and supported to victory dozens of campaigns during her time at Amnesty International and Change.org, her most meaningful and memorable work has focused on mothers and women. From helping families access life-saving medicine for their children, supporting mothers wrongfully imprisoned to return home, strengthening maternity rights, and campaigning to end violence against women.
As a mum who experienced isolation and postpartum depression, Kimberly knows deeply the difference that connection and community can make. She believes that when mums are supported by community, they don’t just survive motherhood - they build the power to shape a world that works better for mothers, babies, and families.
Kimberly Kay
Founder and CEO
Laura Casaceli
Director - Fundraising
Laura Casaceli is a senior fundraising, marketing and communications leader with over a decade of experience across purpose-led and community organisations. She currently serves as Chief Fundraising and Marketing Officer at SurfAid, leading fundraising and communications strategy, overseeing budgets and income streams, and working closely with leadership and boards to support long-term organisational growth.
Laura brings a broad skill set spanning strategic planning, campaign and brand development, financial oversight, team leadership and partnership development. She has a strong track record of building sustainable income streams, engaging supporter communities and translating impact into clear and compelling communications.
Alongside her professional leadership experience, Laura is also a mum, with a deep understanding of the importance of connection, confidence and community in the early years of parenthood.
Hannah Gibbs-Harker
Director - Impact Strategist
Hannah is a strategist and impact specialist with degrees in Psychology, Sociology and Leading Change for Good. She has partnered with leading charities across the UK, Australia and Aotearoa New Zealand, with a career spanning fundraising, strategy, product development, innovation and organisational change. Her work sits at the intersection of people, purpose and innovation—connecting ideas, unlocking capability and helping teams solve complex problems in more human and meaningful ways.
Most recently, Hannah has worked as an impact consultant and capability enabler, supporting organisations to grow their impact, embed purpose and build the capability needed for sustainable change.
A mum to three, Hannah is passionate about perinatal and postnatal mental health and strengthening the systems that support mums and families. Hannah is proud to support Mum Walk, having experienced firsthand the power of a simple walk-and-talk to create connection, compassion and community for mums.
Melissa George
Director - Treasurer
Melissa is a Chartered Accountant with over 10 years’ experience across diverse finance settings, including senior finance leadership roles within the not-for-profit sector and prior experience as an auditor. She has led finance teams through complex projects and periods of transformation, and is passionate about developing efficient, robust processes and sustainable strategies that support organisational purpose and long-term impact.
Having personally experienced the challenges of early motherhood and limited access to support, Melissa is passionate about using her skills to help grow and strengthen the Mum Walk movement.
Samantha Callender
Director - Product and Philanthropy
Samantha is a psychologist turned product leader, with a decade of experience building health and technology products that address some of the most underfunded challenges in healthcare. Across her career, Samantha has built AI-driven solutions for patients with chronic conditions, hybrid models of mental health care, and payment products designed for the healthcare industry.
Samantha trained as a psychologist at the University of Sydney and University of Technology Sydney, before co-founding a national mental health nonprofit that delivered accredited mental health programs to thousands of young people across Australia. She has a strong track record of building from the ground up, engaging communities, developing sustainable philanthropic income streams, and leading with purpose.
Now expecting her first child, Samantha has a deeply personal connection to Mum Walk’s mission. She is passionate about women’s mental health and believes strongly in the power of community.
Want to join the Mum Walk Team?
Mum Walk is governed and led by an incredible volunteer board of Directors. Mum Walk simply wouldn’t exist without the support and skills of our volunteer board as well as our local leaders. If you have skills you’d love to share with the movement check out our volunteer page.