Finnish strategic and service design agency Hellon has been working together with the Helsinki Regional Transport Authority (HSL) for the past 6 years to ensure the sustainable future of Helsinki’s public transport. For their productive partnership, they received the Service Design Award 2022 Best Non-Profit project!We speak with Lotta Julkunen - design director and partner at Hellon - to discuss their well earned award, the philosophy of their partnership with HSL and many more interesting elements for doing successful service design at scale.