Transforming lives through the power of positive psychology
At the Langley Group Institute, we are doing more than teaching wellbeing – we are creating a movement of positive change, growth, and empowerment.
Who we are
The Langley Group Institute (LGI) is a leading education provider of positive psychology and wellbeing education, bridging the gap between the latest scientific research and practical,
real-world application.
As an Australian Registered Training Organisation (RTO #40655), we offer government-accredited courses that transform how individuals, organisations, and communities approach personal and professional growth.
What we do
Since 2013, we've been on a mission to help people create positive change in their lives and the lives of those around them.
Our flagship 11069NAT Diploma of Positive Psychology and Wellbeing, along with the recently introduced 11250NAT Certificate IV in Wellbeing Science, have empowered over 1,700 students with evidence-based tools from positive psychology, neuroscience, and emotional intelligence.
Founded by Sue Langley and Yulia Zlatkin, we continually evolve our curriculum to meet ASQA's high standards and make the science of human flourishing accessible and actionable.



The LGI approach
What sets us apart is our unique approach to learning. We transform complex concepts into practical, easy-to-apply strategies.
Guided by expert educators, students engage in immersive experiences that emphasise real-world applications.
Whether in-person or online, our learning environment fosters connection and growth, creating a ripple effect that positively impacts individuals, teams, and communities.
Our Values
Relationships
Professionalism
Intelligence
Inspiration
Growth
Service
Our team

Sue Langley
Academic Director
Yulia Zlatkin
CEO
Denise Quinlan
Facilitator (New Zealand)Dr. Denise Quinlan is an internationally recognised facilitator and speaker in the field of wellbeing. She brings her broad industry experience and expertise in validated strengths programmes to LGI, enhancing student engagement through her humorous and honest approach.

Barbara Hill
Student Support CoachBarbara is a Diploma graduate who understands firsthand the impact of wellbeing
science. With over 5 years of experience in education, learning and development, she is passionate about helping others integrate positive psychology into their personal and professional lives. Whether you're deepening your learning or applying these tools in your workplace, Barbara is here to support and guide you every step of the way.

Frances Totney
Student Support CoachFrances is a wellbeing specialist and teacher and supports student learning at LGI. With a Diploma of Positive Psychology and Wellbeing, she brings expertise in resilience, mindfulness, and strengths-based training in schools to her role.

Roxanne Mitchell
Programme and Assessment Support ManagerRoxanne manages LGI's courses, psychometric assessments, and accounts with exceptional attention and care. Her expertise ensures the smooth administration of all aspects of LGI's educational offerings.

Kristina Sieg
Business SupportKristina holds a bachelor's degree in social work and a Diploma of Positive Psychology and Wellbeing, and brings diverse experience in mental health and project management to LGI. She leverages her strengths to help students achieve their learning goals and create positive change while also providing vital administrative and operational support.

Loretta Yip
Business SupportLoretta holds a bachelor's degree in education and a Diploma of Positive Psychology and Wellbeing. She is dedicated to helping LGI students create a positive and smooth study experience by providing administrative support with care.