Bluehat anticipates delivering around 500 events this year – a 30% rise on 2012 – and has recruited Tatham to help meet the increase in business.
Tatham joins Bluehat after eight years at Tewin Bury Farm, where she last held the position of business development executive.
Her role will be to maintain and develop existing accounts and to help grow the business.
Charlotte Cornwallis, head of sales at Bluehat Group, said: "Corinne struck me as someone with deep-rooted integrity and who puts the client’s needs first, which makes her a good fit for Bluehat as that epitomises what the company is all about.
"Her ability to build and develop long-lasting relationships is evident through her experience at Tewin Bury and these skills will play an important part in her role here at Bluehat Group."