He joins from TBA where he was head of consumer engagement for a year and a half.
Before this, Keene spent five years at Launch Group, latterly as an account director responsible for integrating experiential activity into campaigns for clients including Tesco and BP.
He joined Slice on 6 January and will lead accounts within the Engine Group and further afield.
Tom Rutter, managing director of Slice, said: "Dan brings an inspiring level of creativity and production knowledge, offering new and existing clients compelling experiential solutions that ensure their brands get talked about."
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To read more about the SRA and how to serve sustainable food at events, don't miss our Real Food Rountable feature in The Guide 2014. You can get it .