Froggatt was previously responsible for running the TNS UK custom graduate programme. He has been with TNS since it acquired the NFO business in 2003. He was group managing director of NFO Bonhill Street at the time of the merger.
Since joining TNS, Froggatt has held several research positions including European product development manager. He has worked in the past on major technology clients including Microsoft, IBM and BT.
David Lowden, TNS chief executive, said: "What were once the distinct markets of telecoms, IT, entertainment and media are rapidly converging, and this mobility within the technology sector is becoming increasingly critical for our clients."
Froggatt replaces Tacis Gavoyannis, who has left TNS to pursue other interests.
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