Organisational Structure


Board Members

Tresillian’s voluntary Board provide advice on strategy and governance. Members include:


Dr Nick Kowalenko

Vice President from 2009 to 2013. Elected President in 2013. Director of the Board since 2003.

Nick is an infant, child and adolescent psychiatrist with clinical, research, educational and policy commitment to promoting the emotional health and well- being of infants, young children and their parents. He’s advised governments and consumer organisations and health service leaders about the most effective strategies to support mothers and fathers parenting under stress. He’s the Chair, Faculty of Child and Adolescent Psychiatry, Royal ANZ College of Psychiatrists and Deputy Chair, Emerging Minds.

Vice President

Natalie Boyd

BA (Mass Comm)
Director of the Board since 2006. Chairman: Public Affairs & Marketing Committee.

Natalie is the Executive Practice Leader at KJA, a stakeholder communications and engagement agency. She has expertise in social infrastructure projects ranging from health and water to community, sports and the arts. As well as contributing to Board, Natalie has chaired the Publicity Committee for a significant period, ensuring her expertise in communication and engagement has supported the profiling success of the organisation.
She is passionate about building resilience in individuals and families and considers this a key outcome of every Tresillian intervention.


Peter Quinn

Director of the Board since 2008. Chairman: Finance Committee.

Peter Quinn is director and Principal of Quinn Financial Planning, and director and co- founder of The Quinn Group, an integrated accounting, legal and financial planning practice. It was his own personal experience that led Peter to Tresillian soon after his son's birth. Peter is committed to ensuring young families are aware of the help that organisations such as Tresillian, can provide to women with postnatal depression.


Susan Redden Makatoa

BA (Communications), GAICD.
Director of the Board since 2008.

Susan is a leading corporate communications professional. A Fellow of the Public Relations Institute of Australia, she has worked in leadership positions for Ogilvy PR, SenateSHJ, delivering strategies encompassing advocacy, corporate, crisis and employee engagement for government and leading brands. She is now an executive headhunter and communications coach specialising in agency and public affairs. A public speaker on women in business, Susan also sits on the boards of the Public Relations Institute, the Touched by Olivia Foundation and social philanthropy organisation Benojo. Susan is a mother of five who’s had invaluable help from Tresillian, and wants to ensure more parents access support during the early years.


Catherine Whitby

BA LLB (Hons I), MSc (Law and Accounting), GAICD.
Director of the Board since 2016.

Catherine is a lawyer with over 10 years’ experience advising the health and social care sector on all aspects of commercial law, corporate and clinical governance and statutory interpretation. Her practice encompasses a broad range of clients, ranging from government departments and statutory agencies, to hospitals, primary health networks, peak bodies and not-for-profit organisations. Outside of work, she holds a number of board and strategic advisory related positions and is the mother of three small, rambunctious children.



Christina Hall

B.Accounting, CA, GAICD, ARITA.
Director of the Board since 2016.

Christina is a corporate advisory and restructuring specialist having spent the majority of her career advising and assisting Boards, management teams and other stakeholders of businesses to maintain and enhance business value. Now the Head of Finance at Vast Solar (an Australian company developing unique solar thermal power generation technology), Christina is passionate about ensuring companies maximise their opportunities to succeed and drive change in their chosen field. Christina's passion for Tresillian and the support it provides to new families stems from her own positive experience with Tresillian helping her with 2 young children who, like so many, refused to fall into a natural sleep pattern.


Executive Team

Chief Executive Officer

Robert Mills


Robert is a Registered Nurse and Midwife with almost 30 years’ experience working in the speciality field of maternal and child health. He holds a Masters of Public Health and has been the CEO at Tresillian since 2013. He is currently the President of the Australasian Association of Parenting and Child Health Inc, and Treasurer of the NSW Health Services Association. He is also a Fellow of the Australian Institute of Company Directors.

Director of Clinical Services


Jenny Smit

B.Sc (Nursing), MPH, MBT, MFMH

Jenny has 15 years experience in the management of hospital, nursing and corporate services with particular expertise in project management, safety and quality accreditation systems. Projects such as the implementation of the National Quality Framework within the early childhood sector have prepared her well for her current position where she is responsible for the planning and development needs of the nursing, medical, social work, psychology and childcare services at Tresillian.

Director of Corporate Services


Troy Trgetaric

B.App.Sc, MPH & JD

Troy is a lawyer and has spent several years working at the NSW Attorney General’s Department and then the Crown Solicitor’s Office.  Previous to his work in the justice sector, he spent many years in the health sector in a variety of management roles. In addition to Troy’s corporate and information management background, he has well developed skills in financial management, change and project management, provision of legal advice and strategic workplace relations.