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Who we are 

We are a global leading team of specialists experts, using our unique capability to solve customer, commercial and social problems.

We are global leading commercial behaviour change experts

We combine masters and PhD level science with decades of proven commercial experience

We are a unique team comprising cognitive and neuroscientists, evolutionary psychologists, behavioural economists, organisational psychologists, brand and marketing experts, data and health scientists

For you, this means you get a bespoke team of highly skilled specialist experts solving your most complex problems in your category and context

Will you unlock growth by engaging a genuine commercial behaviour change team?

ASK US HOW

Our unique team of experts

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Tara Ness Managing DirectorTara leads our team of specialist behaviour change experts who are laser-focused on generating commercial and customer ROI+ outcomes. In her 15 years of consulting, working hand in glove with leading Executives, Tara has played a leading role in some of Australia’s most well-known growth and turnaround case studies. With deep expertise in Financial Services, Healthcare, Aviation and Retail – she has informed CEX & brand strategy, behaviour change interventions and measurement systems with proven commercial outcomes. 
Tara Ness Managing Director
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Dr Johann Ponnampalam, PhD Co-FounderFounded Decision Design with the principal aim of translating hard science into practical, commercially implementable interventions to create business impact. Johann is considered a global thought leader in commercial behavioural science, is an active advisor to c-suite leadership teams and has specific interest in the quality of commercial decision-making, and its direct impact on business bottom line.
Dr Johann Ponnampalam, PhD Co-Founder
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Jessica Mccartney Managing Director - Learning

Jess leads Decision Design’s learning, automation and scale unit. With deep experience in integrating behaviour change capability within organisations, she is laser-focused on maximising the impact that behaviour change capability brings organisations. She works at the intersection between education, technology and behavioural change, uniquely placed to bring behaviour change capability to business, at scale. Jess has a Bachelor of Arts (Professional Communications) from RMIT and 20+ years industry experience. 

Jessica Mccartney Managing Director - Learning
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Winona Johnson Senior Behavioural scientistWinona is an experienced  behavioural scientist with a Masters from The University of Melbourne in Applied Psychology. She has facilitated impactful behaviour change across multiple industries. As a career consultant  Winona helps her clients to navigate the complexity of what is driving human behaviour, and practically applies evidence based behavioural science in a way that allows them to achieve measurable customer and commercial outcomes.
Winona Johnson Senior Behavioural scientist
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Sandy Muir Head of Growth EnablementSandy is laser-focused on using behaviour change science to grow our partner's businesses. Sandy brings 15+ years of strategic commercial growth across agency, education, and government, with a specific focus on brand building. Sandy knows how to build and embed behaviour change science as a critical growth tool having partnered with genuine specialist commercial behavioural scientists, to take one of Australia’s leading universities from challenger brand to the largest and fastest-growing university in Australia.
Sandy Muir Head of Growth Enablement
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Jack Keramea Behavioural Scientist

Jack holds a Bachelor of Psychological Science (Behavioural Science) from the University of Tasmania and a Master of Analytics & Data Science from the UNSW. As an experienced behavioural scientist, Jack helps Australia’s leading organisations maximise customer plus commercial outcomes by harnessing proven behavioural science — serving as the bridge between behaviour change ideation and industry implementation. With a deep understanding of what makes consumers tick, his work focuses on optimising comms, journeys, touchpoints, and assets for maximal behaviour change impact — generating a proven track record of success.

Jack Keramea Behavioural Scientist
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Millie Niere Behavioural Scientist

Millie is most energised when achieving measurable, practical behaviour change outcomes by applying behaviour change expertise - through depth understanding of human behaviour. Millie generates positive outcomes and returns for clients, particularly within the Financial Services industry. Millie holds a Master of Applied Psychology from the University of Melbourne.

Millie Niere Behavioural Scientist
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Sarina Finocchiaro Behavioural Scientist

Sarina holds a Masters of Applied Psychology from the University of Melbourne.  She has a deep understanding of the multifaceted process of human decision-making in contexts including purchasing behaviour, social interactions, and policy design. She specialises in financial services and loves investigating customer behavioural barriers.  

Sarina Finocchiaro Behavioural Scientist
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Lily Whelan Behavioural ScientistLily holds a Bachelor of Neuroscience and a Master of Cognitive Science from University College Dublin, Ireland. As an experienced behavioural scientist, Lily works with leading, behaviourally curious clients to investigate and inform what truly underpins their customer’s decision-making and, therefore, behaviour. 
 
Lily Whelan Behavioural Scientist
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Dr Andrew Chapman, PhD Co-Founder

Andrew holds bachelors-honours-PhD across health + neuroscience. He has 20+ years experience spanning behavioural science, research-analytics, marketing and strategy, to VP, Country Head, and Founder level – working internationally with a global client list including CEO level. He leads award-winning commercial behaviour change, research, communications and campaign work — has twice led teams ranked #1 commercial agency partner by ASX Top 20/Fortune 100; and led Effie-award campaigns and award-winning sales training. He has trained experts in 50+ markets, from Fortune 100 exec teams, medical experts, account managers and sales teams, to healthcare clinicians. 

Dr Andrew Chapman, PhD Co-Founder
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Chris Harvey Head of Behavioural AnalyticsChris holds a Bachelor of Business (Honours)(Marketing) from Monash University with a minor in Econometrics. Chris has extensive end-to-end insights delivery experience, having built and ran numerous measurement systems as a specialist research designer, analyst and consultant across a range of industries and markets globally. Leveraging his 14+ years of best-in-class design and advanced analysis application, Chris understands the nuances of executing successful measurement programs and has a proven ability to apply them to drive ROI+ change 
Chris Harvey Head of Behavioural Analytics
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Darcy Bennett Senior Behavioural Scientist

Darcy has broad experience applying behavioural science to challenges in both industry and government, focusing on delivering measurable and impactful behaviour change. He works with clients to identify key drivers of behaviour, develop and test evidence-based solutions, and implement interventions that lead to meaningful shifts in behaviour. He holds a Bachelors of Arts (Psychology), and Masters in Applied Psychology from the University of Melbourne.

Darcy Bennett Senior Behavioural Scientist

"Our vision is to change the behaviours that change the world."

 
TARA NESS MANAGING DIRECTOR

Your career: chase the behaviours you want to change

Work with world-leading commercial behavioural scientists, combining their unique skills and experience to solve the most thorniest challenges.

Looking for a new, better career challenge?

If you thrive in a culture of collaborating with a team of unique specialist experts, believe the sum is greater than the parts and want to learn from world-leading commercial behavioural scientists...

If you want to grow your consulting and technical skills and are motivated in an environment of complex challenges where no problem, design or solution is the same...

Then, we want to hear from you.