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School of Transformation


Dr David Mulford

Former Principal - Newington College, Sydney

Dr David Mulford was a School Principal of three large schools from 1992 to 2018. His last appointment was as Headmaster of Newington College from 2009–2018. 

His qualifications include a Bachelor of Economics, Masters of Education and a Doctorate of Education. In addition, he is a graduate of the AICD and a Fellow of ACE.

Dr Mulford has served on many boards including Bishop in Council for the Anglican Church in Canberra; a number of national education boards; sporting and visual arts boards; and since 2018 has served on the Tupou College board in Tonga.

Dr Mulford has an educational leadership consulting business and volunteers with a number of charities.


Julia Grace

Mental Health Facilitator

Julia has an incredible ability to educate about Mental Health without you even realising that you’re learning.  Her honesty is inspiring, the humour is side-splitting, and her voice is breathtaking.

A truly gifted communicator, with qualifications in Mental Health and education plus entertainment awards, Julia Grace continues to dazzle audiences all over the world as she teaches
Be Kind to Your Mind.


Marshall Diggs

School of Transformation /

GCLA Director

Marshall has a background as a principal, community leader and keynote speaker, Marshall’s role as Director at the Growth Culture Leadership Academy perfectly combines his incredible ability to inspire educators, with his strengths in leadership, coaching and mentoring.

Marshall and his wife are also deeply committed to global impact. Currently, they are pioneering community transformation projects in Australia, Uganda, Fiji and New Zealand in partnership with several charitable organisations including the Strengths Foundation and World Vision.

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