Our people
Our people drive our purpose to support people living with spinal cord injuries and related disabilities.
Our Executive Leadership Team
With extensive experience across corporate leadership, non-profit and clinical settings, our team is dedicated to achieving positive outcomes for our members, clients and community.
Nicole Sykes
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Nicole is a purpose driven leader with more than 25 years of experience across healthcare and disability services. Beginning her career in clinical practice and progressing into executive leadership, Nicole combines strategic insight with a deep understanding of person centred care.
As CEO of estara, Nicole is committed to ensuring South Australians living with spinal cord injuries and neurological conditions have access to services that are empowering, innovative, and responsive to their needs. Her leadership is grounded in integrity, collaboration, and a focus on outcomes that make a real difference in people’s lives.
Nicole works closely with boards and advisory committees across the health and disability sectors and is proud to lead estara’s dedicated team, united by a shared commitment to independence, dignity, and connection for the people they support.
Before joining estara, Nicole served as CEO of the Australian Medical Association SA, where she led strategic transformation, strengthened governance, and championed advocacy for clinicians and the health sector. Her career reflects a consistent focus on building high-performing teams, fostering collaborative cultures, and driving improvements that benefit both clients and communities.
Nicole is a Graduate of the Australian Institute of Company Directors and maintained registration with the Australian Health Practitioner Regulation Agency (AHPRA) for many years until recently. This long-standing professional registration reflects her deep understanding of clinical practice and governance, which continues to inform her leadership and regulatory expertise.
Andrea Collett
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Andrea Collett brings a wealth of experience paired with a heart-centered approach to her role as Chief People Officer at estara.
Leading our people and culture team including quality, she is deeply committed to cultivating an inclusive workplace where every individual feels valued, heard, and empowered to thrive. With over 20 years in human resources and a strong emphasis on learning and development, Andrea champions the transformative power of collaboration and creativity, believing that these elements unlock the unique potential within each team member.
Her impressive professional background features notable achievements, including an MBA from the University of Adelaide and recognition for excellence in Australian learning innovation. With extensive consultancy experience, particularly in the disability sector and not-for-profit organisations, she emphasises connection and empathy, advocating for diverse perspectives that foster innovative solutions.
Outside of her professional commitments, Andrea treasures family time with her husband, two children, and two beloved dogs. An active member of her community, she has also participated in coaching and leadership roles in softball. A proud first-generation Greek Australian, Andrea’s inclusive spirit and warm personality resonate in every interaction, making her a cherished leader within the estara community.
Anika Johnstone
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Anika Johnstone has a multidisciplinary background in strategy, research and insights. service transformation, marketing communications, digital and experience design.
She has led teams to deliver innovative and high-profile projects across government, education and not-for-profit sectors in Australia and the UK. She was awarded a Woman in Innovation award in 2018 and has twice been named in The Advertiser’s SA Women ‘Ceiling Smashers’ lists (2019 and 2022). She is passionate about community led innovation and driving positive change through co-design and person-centred practice.
Anika is excited to be able to amplify the critical work being done by estara across the community to create opportunities for access, independence and connection, particularly among the Spinal Cord Injury community in South Australia.
Anika holds a Bachelor of Arts (Honors) in Politics and a Master of Arts in Journalism as well as a Diploma of Project Management. She also sits on the KidSafe SA Board. In her spare time, she loves spending time with her family and two dogs, camping and bushwalking as well as creating a permaculture-inspired garden at home.
Rachael Griffiths
Our Operations Leadership
Helen Whitworth
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Helen is passionate about creating inclusive, person-centred services that empower people to live their best lives. As Director of Spinal and Specialised Disability Supports at estara, she brings a collaborative, grounded approach and a strong commitment to supporting people with complex and lifelong needs.
With more than two decades of experience across disability and health services, Helen has held senior leadership and clinical roles spanning governance, service design, and workforce development. Prior to joining estara, she led Client Operations at MS Society SA & NT, where she developed the organisation’s Clinical Governance Framework, Service Delivery Model and helped design a new wellness centre to better support people living with neurological conditions.
Helen’s earlier career includes senior management roles at CARA Inc and almost a decade as Principal Clinician for Hearing Services at Guide Dogs SA.NT. Helen holds qualifications in Clinical Governance, Management, and Training and Assessment, and her background in Auslan interpreting and audiometric assessment reflects her lifelong commitment to communication, accessibility, and inclusive practice.
Known for building strong relationships and fostering respectful, high-performing teams, Helen works closely with clients, staff, and partners to ensure services are responsive, sustainable, and genuinely centred on people’s lived experience. She is driven by a belief in social justice and the power of collaboration to create meaningful and lasting change.
Our Board of Directors
Beth Davidson-Park
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Beth has extensive executive and non-executive leadership and management experience in public and private sector organisations including AnglicareSA, Southern Cross Care (SA & NT) and the Cities of Adelaide and Onkaparinga.
She has led and managed operational and strategic roles, capital development projects and the delivery of front-line community and social services.
Beth also Chairs the Catalyst Foundation which provides consultancy services to not-for-profit organisations and coaching and mentoring services to individuals.
Passionate about making a difference in all that she does, Beth has served on several Boards and Advisory groups. These include Power Housing Australia, SACOSS, Child and Family Welfare SA, LG Professionals, Libraries Board SA, and Multicultural Aged Care SA. She has a deep reserve of knowledge and learning and is a strong advocate for those around her. She approaches her work with optimism, enthusiasm, and determination.
Beth is committed to engaging with individuals and communities on issues which impact them. Beth also provides consulting services in not-for-profit, government and education sectors and is currently General Manager at Alwyndor Aged Care.
Beth joined the estara Board in September 2019 and was elected Chair in June 2022.
Tony Vroulis
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Tony Vroulis is a Chartered Accountant with over 20 years of industry experience and is a founding member of WVB Chartered Accountants, a boutique Adelaide accounting firm.
A well-networked professional, Tony provides strategic and personalised taxation, accounting, and business advice to small to medium-sized enterprises and high-net-worth individuals including private investment companies, property developers, professional athletes, legal professionals, and those in the hospitality industry.
Tony joined the estara Board in April 2019.
Steve Trestrail
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Steve started his working career as an apprentice plumber and moved into corporate business following a spinal cord injury in 1980, as a result of a sporting accident. Steve has worked for over 37 years in various industries, including general and health insurance, workers compensation, compulsory third-party insurance, and most recently, the waste management industry.
Working with major organisations such as Insurance Australia Group, EML and Cleanaway, Steve has a broad range of experience in roles focused on improving internal business performance whilst supporting delivery of customer expectations through business planning, quality management, process re-engineering and management of major projects. He has a graduate certificate in management and holds Six Sigma accreditation.
From early rehabilitation to becoming a Paralympian representing Australia in wheelchair basketball, Steve has demonstrated commitment and leadership qualities to drive successful outcomes for people living with spinal cord injuries in South Australia.
For Steve, being involved with estara is an exciting time to help create the required support and opportunities for those living with a disability, ultimately making a positive difference in their lives. He was appointed to the Board on 1 July 2021 and was Deputy Chair from November 2022 to November 2023.
Terry Tenove
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Terry Tenove is a Lived Experience Director who brings over 15 years of lived experience as a quadriplegic following a spinal cord injury, along with extensive experience in peer support, advocacy, and community leadership.
After sustaining a spinal cord injury that resulted in permanent wheelchair use, Terry has focused his career on supporting and empowering people living with spinal cord injury and other physical disabilities. For the past five years, he worked with Spinal Cord Injury Alberta (Canada) as a Peer Coordinator, where he mentored newly injured individuals in hospital settings and coordinated a team of peer mentor volunteers. Through this work, Terry supported people during major life transitions, helping them build confidence, independence, and connection within their communities.
Terry has been a strong advocate for accessibility, inclusion, and the meaningful involvement of people with disability in decision-making. He is passionate about ensuring lived experience is valued at every level — from direct services to organisational leadership — and about challenging assumptions around what people with disabilities can achieve.
He holds degrees in Physical Education and Education from the University of Alberta, which have provided a strong foundation in communication, teaching, and collaboration. This background supports his ability to engage effectively with individuals, families, professionals, and organisations, translating lived experience into practical insight.
As a Board member, Terry is committed to ensuring lived experience remains central to governance and strategy. He brings a perspective shaped by personal experience, professional practice, and a belief in the importance of representation, inclusion, and strong community connections.
Outside of his professional work, Terry is a husband and father of two. His role as a parent further informs his advocacy and reinforces his commitment to building inclusive communities where people with disability, and their families, are supported to thrive.
Terry joined the Board in November 2025.
Graeme McDonald
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Dr Graeme McDonald is an experienced, dependable and well-respected leader, scientist and educator. Graeme has worked as an exploration and resource geologist for over 25 years within the mining and resources industry and now manages his own geological consulting business.
Having held managerial positions with a number of mining and exploration companies, Graeme has worked constructively and collaboratively with large multidisciplinary teams and external community stakeholders. He has developed a strong understanding of company reporting and governance processes.
Graeme has a prolonged history and lived experience with a spinal cord injury. Having lived for over 40 years with the effects of a spinal cord injury, a formal diagnosis of incomplete tetraplegia was only made relatively recently in 2019. This lived experience together with his scientific background and a strong governance history will add significant diversity to the current Board.
Graeme is a Graduate of the Australian Institute of Company Directors and currently the Chair of the Australian Institute of Geosciences (SA Branch). He enjoys spending time with family, being engaged with sport and the outdoors.
Graeme joined the estara Board in March 2026.
Jacki Done
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With more than 25 years’ experience across the for-purpose, local and state government and private sectors, Jacki brings extensive expertise in executive leadership, strategic planning, business improvement, workforce performance, quality, governance and organisational change. She has a proven track record of delivering results within complex, multi-divisional organisations and is passionate about creating great workforce experiences through effective leadership, strong organisational culture, professional development, and fostering connection and belonging.
A Graduate of the Australian Institute of Company Directors with substantial board experience, Jacki also holds Certificate Membership with the Australian HR Institute and accreditations in change management, facilitation, and executive coaching.
Jacki joined the estara Board in June 2026.
Prue Reid
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Prue Reid has had a long and diverse career, starting out as nurse for about 10 years and then attending University to do an Arts degree and a Law degree. Prue has worked in private law firms for 10 years, the Crown Solicitors Office for 3 years and then moved into the Department for Health and Wellbeing as a Director, and Executive Director of the Legal and Governance unit and the Governance Advisory Services. Prue brings to estara a vast knowledge of governance, law, risk, strategic thinking, the disability sector and a strong operational background in large organisations. In her downtime Prue attends weekly painting classes, is a volunteer at the Art Gallery of SA, enjoys exercise, and a large extended family and friends. Prue is passionate about enriching the lives of people living with a disability.
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