About us
The Sky’s The Limit Behaviour Services, or TSTL for short, is a small service provider in the disability sector specialising in service delivery of Applied Behaviour Analysis (ABA). Our mission is to provide students and graduates seeking clinical experience a taste by working in the disability sector. We have an established team of therapists in Sydney since 2018 and in Melbourne since 2020.


We value our staff and reward them with industry award wages including superannuation. There are plenty of opportunities for career progression and upskilling in TSTL as we begin to expand to rural areas and into other states and territories as well as into other professions. Some opportunities include business administration, human resources, accounts and payroll, positive behaviour support clinician, Board-Certified Behaviour Analyst, and counselling. Through training and supervision, we aim to inject qualified therapists in an industry where ABA therapy is sorely needed. Have a look at our Careers page for any vacancies.
Meet the team
The Sky’s The Limit team are passionate about service delivery to improve the quality of life of the people we work with. We value ongoing professional development and encourage open collaboration with other service providers and professionals working alongside us and with our families

John Rebullida
Founder & Behaviour Support Practitioner
Meet John, a seasoned professional in the disability sector since 2014, specialising in ABA therapy for children and adolescents. He’s dabbled in various ABA approaches, from DTT to PRT and VB, and began his journey as a junior therapist at the Lizard Centre in Sydney. Now, as an independent therapist and the founder of The… Continue reading John Rebullida

Karla Vitone
Junior Therapist
Karla is currently in her third year of a Bachelor of Psychological Science at Deakin University. She has a strong passion for working with vulnerable children and hopes to pursue clinical research or a career in child and adolescent psychology. Karla completed her ABA certification through Autism Pathways and has been working in the field for over a year!
CAREERS
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