Sarah Lewis is a Certified European Passivhaus Designer and Associate Architect – Sustainability at Hamson Barron Smith, where she is delivering and working on some of the UK's largest Passivhaus developments. She has lectured on Passivhaus and the PHPP and been a guest critic at a number of architecture schools. She has spoken at conferences including the International Passivhaus Conferences in Innsbruck 2011, Leipzig 2015 and Vienna 2017 and participated in conference panel and industry debates on sustainability. And in 2015 had the honour of being one of the international judges for MIT’s Center for Collective Intelligence Climate CoLab Buildings contest. In recognition of Sarah’s contributions to UK low energy architecture, she was named one of the top 20 women leading the way in sustainable architecture in the first annual Architect’s Journal list 2013 and awarded Constructing Excellence Achiever of the Year, for the East of England, 2015.