Our Team

Tineke Sibbel, BCBA, Clinical Director, Happy Oak Behavioural Consulting

Tineke Sibbel, BCBA, presenting at 2017 ABIA Conference in Melbourne

Tineke Sibbel, M.Ed (Early Childhood Education), BCBA, Board Certified Behaviour Analyst and Clinical Director/Owner

Tineke has been working with children for over a decade and helped establish Happy Oak when it was founded in 2013. Tineke undertook her BCBA (Board Certified Behaviour Analyst) coursework through Florida Institute of Technology and her supervision hours under Elyssa Mckee who was the first BCBA supervising children in Melbourne. Tineke also holds a Master of Early Childhood Education at Monash University.

Tineke works with children and their families developing ABA early intervention programs for children diagnosed with an Autism Spectrum Disorder. She draws upon unique skills from her undergraduate degree in Music and Performing Arts to engage and motivate the children with whom she works.

She has significant experience administering assessment using the ABLLS (Assessment of Basic Language and Learning Skills) and VB MAPP (Verbal Behaviour Milestones Assessment and Placement Program)  and developing and implementing Individualised Education Plans. She develops Behaviour Support Plans to target challenging behaviours and works collaboratively with educators and schools to provide the best possible outcomes for the children with whom she works.

Tineke is a teaching associate in the Master of Education- Applied Behaviour Analysis at Monash University. She loves motivating and training the next generation of Australia’s Behaviour Analysts. Disseminating the field of Applied Behaviour Analysis is a focus of hers, she thinks that more kids in Australia deserve high quality intensive early intervention.

She is a member of the New Zealand Association for Behaviour Analysis, Autism Behavioural Intervention Association and Applied Behaviour Analysis International. She has presented at the Positive Practices Symposium at the Centre of Excellence for Clinical Innovation and Behaviour Support (University of Queensland). She also presented at ABIA’s 2017 conference  (read her presentation here).

Tineke has experience delivering professional development workshops and talks to educators at schools around Melbourne, promoting inclusion and the use of ABA strategies in their classrooms. She has extensive experience working collaboratively with a range of Melbourne’s schools and kindergartens; catholic, independent and public. Some of which are the leader’s in their category. She supports educators and trains support staff to facilitate social interactions and develop social skills as well as encouraging learners on the spectrum to participate in activities at school alongside their peers.

Tineke is very passionate about inclusion in the mainstream school system, social skill development and developing communication skills for learners diagnosed with an ASD.


Sarah Scambler, Director/Owner

Sarah ScamblerAfter a career in the advertising and not-for-profit sectors, Sarah developed a passionate and personal interest in autism and ABA when a family member was diagnosed on the spectrum. At this time, there was only one BCBA working in Melbourne with children – Happy Oak’s founding Clinical Director, Elyssa McKee, BCBA. Sarah saw how it is possible for a child’s life trajectory to shift significantly when they receive intensive VB ABA supervised and delivered by BCBAs and well-trained behaviour interventionists.

Sarah subsequently became involved with Happy Oak to help provide Australian children with world class, evidence based ABA so that these children will grow up to be effective communicators who are happy, resilient, proud of their neurodiversity and who will make a valuable contribution to society as adults. She encourages the Happy Oak staff to have an open, flexible and creative mindset and to collaborate with the families to help make positive behavioural changes. As someone who has had close involvement with a child on the spectrum, she has the experience and empathy to encourage and support families as they seek the best long-term outcomes for their children. With gold standard VB ABA kids can get the best start in life.


Stephanie Berry, M.Ed (ABA), BCBA Board Certified Behaviour Analyst Program Supervisor

Stephanie has over eight years of experience in Applied Behaviour Analysis, and was a founding employee at Happy Oak when it started in 2016.

Stephanie is a fully qualified Board Certified Behaviour Analyst (BCBA) and an accredited supervisor to develop others within Happy Oak Behavioural Consulting working towards the BCBA, BCaBA, and RBT qualifications.

 She completed the Master of Education in Applied Behaviour Analysis at Monash University, where she led a research project on the development of communication skills. Stephanie presented this research at the ABA Today Conference in 2019. She also holds a Postgraduate Diploma in Psychology from Deakin University and a Bachelor of Applied Science (Psychology) from RMIT University.

 Stephanie prides herself on being a subject matter expert on new developments in ABA research. She works closely with Tineke to make clinical changes at Happy Oak, including setting up Telehealth in 2020, and introducing changes to behavioural management strategies in order for behaviour plans to work best for each individual family. Stephanie is passionate about helping children reach their full potential, and this is reflected in her work.


Laura Buontempo, BBus(Psych), Program Supervisor

Laura completed her Bachelor of Business (Psychology) in 2016 and is currently undertaking her Master of Education in Applied Behaviour Analysis at Monash University. She is currently working towards her professional certification.

Upon discovering ABA therapy and Verbal Behaviour throughout her major in psychology, in 2016, Laura began working as an ABA Therapist. She felt privileged to work with a bright young boy diagnosed with Autism Spectrum Disorder who allowed her to step into his world and to be a part of his inspiring moments of growth. This young boy prompted Laura’s passion to pursue her career path. Since working independently in the field, Laura has gained experience in Applied Behaviour Analysis, Natural Environment Teaching and Verbal Behaviour methods. Laura holds personal interests in psychology and ASD and is passionate about nurturing children to build skills that will assist in leading them to enriched and independent lives.


Nisha Rajbhandari, Program Supervisor

Nisha came to Australia in 2013 to study Bachelors of Psychological Studies from Victoria University. After discovering her passion for ABA three years later, she has focused all her energy on improving her skills as a therapist. Currently she is studying Master of Education in Applied Behaviour Analysis from Monash University. Nisha has experience working with children who are two to six years old both in-home and kindergarten setting. In her free time Nisha likes to watch series, explore new places and read novels. Nisha loves the kids and her families and they love her back!


Carly Wadsworth, Registered Behaviour Technician (RBT), Assistant Program Supervisor

After completing her Honours in Psychology, Carly is currently completing her Masters in Educational and Developmental Psychology. Carly’s has over 10 years experience working with children. During this time Carly has extended her ABA knowledge, and achieved her Board certification as Registered Behaviour Technician. Carly’s passion is to deliver engaging sessions to facilitate your child’s learning. Her favourite part of her job is watching her learners grow, develop, and succeed.


Chloe Fung, Senior Behaviour Interventionist (RBT)

Chloe is currently studying Master of Applied Behaviour Analysis and is working towards her professional certification. She is inspired by her learners and loves being able to make a positive contribution to the lives of the learner and their families! Chloe has also worked as a tutor and a nanny. Her passion for working with children began when she was able to see how influential she could be as a mentor and educator and how rewarding it was to be able to see her students grow. During her spare time, Chloe loves cooking for her friends and family, painting and doing pilates.


Jemma Singleton, Senior Behaviour Interventionist, (RBT)

Jemma graduated from RMIT University with a Bachelor of Criminology and Psychology. She comes from a sport coaching background and has been coaching swimming and synchronized swimming for many years. In her swimming teaching role Jemma worked with a range of different children, babies through to teenagers both typically developing and with additional needs, all requiring different levels of support in order to reach their swimming goals. Her passion for helping people succeed and thrive in their own way has driven her to become involved with ABA therapy. She loves watching the children she works with achieve their goals!


Phebe Tan, Scheduling and Admin Queen

Phebe is organised, empathetic and caring. Prior to Happy Oak, she worked for many years in the IT industry, in various countries across different platforms. These roles had a focus on client support and project management. Phebe has experienced first-hand the great benefits of ABA therapy and early intervention, hence her passion and interest in ABA. She has also taken the ABIA therapist course. Phebe loves working in a team and seeing these beautiful children have access to their early intervention!


Ned, Charlie & Lola

We have staff dogs who are frequently at Happy Oak – Ned AKA “Beastie Boy”, the cavoodle, Charlie and Lola the toy poodles who are insta famous.

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