Nathan Cruz Coulson is the CTO and co-founder of Bold Donut, a company helping organisations to engage and activate their audiences on key sustainability topics such as sustainable energy use and waste segregation, using fun digital games. Nathan has worked on national campaigns with clients like ESB Networks and the Irish Government authority on waste to engage thousands of people with positive behaviour change. Bold Donut's games can be customised for an organisation's brand and campaign objectives - for example a waste segregation game to encourage the use of reusables in an office or a electricity game focused on shifting electricity demand to off-peak times to reduce carbon emissions and energy bills.

Prior to co-founding Bold Donut, Nathan was a Senior AI Technologist at Digital Catapult where he advised startups and corporates on the ethical and effective adoption of AI. He has over 10 years of experience working for tech startups (commercial and technical roles) and supporting startups as part of accelerator programmes. Nathan is a Data Science for Social Good (DSSG) fellow and holds a MSc in Data Science from the University of London, Birkbeck.