The Difference Engine

Sam is our first chief marketing performance officer and leads our work in offering the most advanced measurement and evaluation techniques in the industry. Sam incorporates knowledge across core digital disciplines including media planning, buying, optimisation and combines this with extensive attribution, analytics, targeting and data modelling experience.  Dedicated to finding and growing synergy across online and offline channels, he delivers the most efficient and effective digital marketing campaigns. 

Anne leads our government sector work globally across paid, owned and earned. Four has been the leading agency in the public sector in the UK for more than five years according to PR Week and we have coveted government roster spots in the UK, Wales and MENA. Anne brings her Masters in psychology together with decades of experience in designing and evaluating behaviour change campaigns to bear on the work that she does. Clients have included Home Office, FCO, DHSC and MoJ. 

Einir Williams is a co-founder and group managing director at Four. She has  experience across creative, digital and communications in the UK and MENA  and has worked with clients such as The Palm, Chip & PIN, BEIS and the Welsh Government. As a group board member she holds responsibility for new business, marketing, tendering & procurement, legal and social value.