Organisational Structure

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.


Council Members

Tresillian is managed by a voluntary board known as the Tresillian Council.  The Council Members are:


Dr Nick Kowalenko

Vice President from 2009 to 2013 Elected President in 2013 Member of Council since 2003 Member: Quality Committee

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)
Member of Council since 2006 Chairman: Public Affairs & Marketing Committee

Natalie is the Executive Practice Leader at KJA, a stakeholder communications and engagement agency. With more than 20 years’ experience in communications and engagement, Natalie is a respected specialist with expertise in projects ranging from health to the arts. Natalie is passionate about building resilience in individuals and families, and considers this a key outcome of every Tresillian intervention. As well as contributing to Council, Natalie has chaired the Publicity Committee for a signicant period.


Peter Quinn

B.Bus CA, ACIM, FAICD, CFP Member of Council since 2008 Chairman: Finance Committee Member: Audit 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 when his wife experienced severe postnatal depression soon after 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 Member of Council since 2008 Member: Quality Committee, Public Affairs & Marketing Committee

Susan is one of Australia’s leading communications professionals. In her role as Group Managing Director Corporate for Ogilvy PR, she oversees public affairs companies, Parker & Partners, Ogilvy Impact and Ogilvy’s corporate and issues practice. Susan is also Chair of Executive Women Australia, an organisation representing over 300 of Australia’s most senior women. A mother of four who’s had invaluable help from Tresillian, Susan wants to help other parents access support during the early years.


David Lillystone OAM

Member of Council since 2007 Member: Medical Staff Council

David has a wealth of child and family health knowledge as a Community Paediatrician. In 1976 he was appointed Sector Director, Child and Family Health, for Hornsby Kuring-ai Health Service. David’s involvement with Tresillian began in the Seventies when lecturing student nurses studying for their Mothercraft Certi cate. He was invited to join Council in 2007 and was awarded the Order of Australia in 2012 for services to child and family health.


Paul Robson

B.Comm Mgt & Mktg, Grad Dip (Gen Mgt) INSEAD, Grad Dip (Int Bus) UHelsinki
Member of Council since 2008 Member: Public Affairs & Marketing Committee

Paul Robson is Adobe’s President for the Asia Pacific region. He is a dynamic and respected leader in the IT and digital marketing sectors, with a proven history of leading business transformation initiatives at both an operational and executive level. Paul is highly passionate about the delivery of world class services, and in particular how Tresillian can use the advances in digital technology to further broaden their reach to families needing assistance with their baby or toddler. 


Bruce Callaghan

B.Soc Sci, Dip. TAS, CertIV.TAE Member of Council since 2013

Member of Council since 2013 Bruce Callaghan is Executive Chair of BCA National Training Group (BCA National). Bruce has served on several not-for-profit Boards, and led a boutique consultancy, Bruce Callaghan & Associates. Bruce is a specialist in Board governance, business development, management and strategic planning and has held a number of senior posts in government in the Human Services area. He has also lectured at the University of NSW in public administration, and contributed as a visiting lecturer to the School of Psychology at Macquarie University.


Catherine Whitby

BA LLB (Hons I), MSc (Law and Accounting), GAICD

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

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.


Karen Den-Toll


Karen is a lawyer with over 24 years’ experience.  She has worked in major Australian companies and law firms, as well as consulting internationally to organisations such as the World Bank and the IMF.   Karen’s specialisations include corporate governance, and she graduated from the Australian Institute of Company Directors program with an Order of Merit.  As a mother of a young daughter, Karen is passionate about Tresillian’s role in imparting the collective wisdom of generations, using both modern and traditional methods, to build confidence and resilience in families.


Organisation Chart

Tresillian Organisation Structure Chart 2015