Team
Meet our experts
The Positive team thrives on differences: we have a wide range of working backgrounds and a huge breadth of experience. But there is one thing we all have in common: a passion for harnessing science to help people get the best from their brains.


Will Marien
Co-Founder and Chief Executive Officer
Will is passionate about workplace mental health and performance and specialises in organisational behaviour change. He’s spent the last 10 years working across multiple sectors, transforming behaviours and culture in SMEs, corporate organisations, schools and universities.

Hattie Crosthwaite Eyre
Chief Operating Officer
Hattie is fascinated by human psychology and how we can get the best from our brains. She has a 1st class degree in Human Sciences from Oxford and an MSc in Public Health. She was an Engagement Manager at McKinsey, then COO at psychology start-up Potentialife.

Dr Sinéad Devine-French
Chief Product Officer
Dr Catherine Marshall
Delivery Director

Dr Ellie Smith
Research Manager

Dr Sophia Seltzer-Eade
Client Team

Trish Pashazadeh-Allen
Client Team

Dr Tim Knowlson
Client Team

Georgia Bolton
Client Team APAC

Clare Fitzsimmons
Client Team APAC

Caro Parker
Product Manager
Caro loves supporting people to build healthy psychological skills that stick. She worked in primary and secondary schools for 15 years as a teacher and adolescent coach, and on youth product development at psychology start-up Potentialife.

Neil Thayer
Product Manager
Neil loves building technology products that customers enjoy. He joined the Positive team from a career in software architecture and product and is motivated by using technology for good. He has a keen interest of psychology and neuroscience that he applies to everything he …

Shona Wood
Marketing Manager
Shona is an English Language and Linguistics graduate with a profound appreciation for both creativity and science. She is passionate about the importance of mental health awareness and encouraging organisations to adopt a proactive approach to wellbeing.

Eleanor Hambleton-Smith
Senior Client and People Manager
Eleanor is passionate about supporting our team to thrive in their careers at Positive. She comes from a finance background, having worked in various sectors for nine years. Eleanor achieved a first class degree in her BA, Criminology with Sociology.

Rachel Vernazza
Client Success Specialist
Rachel is a qualified dentist and comes to Positive after working as both a clinician and in an educational-technology startup overseeing operational transformation. She has a keen interest in technology’s ability to do good at scale, particularly in the healthcare sector.

Alice French
Finance Administrator
Alice provides finance support at Positive and enjoys making sure the business runs smoothly. She has an MSc in Transport and Business Management and a wide range of experience working in both the public and private sectors, and with local community groups.

William Astley
Technical Operations Specialist
William provides the team with technical knowledge and gives high level support to clients. He is interested in how virtual reality might change the learning landscape, and recently completed a degree in Computer Science at the University of Kent.

Lisa McAlpine
Executive Assistant
Lisa has more than 11 years of experience providing support to senior level executives, directors and clients across multiple industries. She enjoys building and developing relationships, and thrives in a fast-paced team environment focused on client delivery.

Debbie Mack
Global Pitch Manager
Debbie has joined Positive from the Technology sector, previously working in account management and business development roles with global clients. She has an MSc in Management & Leadership and loves working with organisations to build long-term strategic partnerships.

Colm Roche
Brand and Design
Colm is responsible for the Positive brand and oversees the company’s creative output, including our website, app, online platforms and illustration. He has over 15 years’ experience, working with major international brands such as Nike, Tate, Unilever and NetJets.