Haslett moves from his previous role as president and managing director of Ipsos ASI Canada, where he worked for 11 years, to his new post of chairman in the UK.
Haslett is charged with developing business for the survey-based research company, which is owned by Ipsos Mori.
Brian Gosschalk, Ipsos Mori chief executive, said: "Peter will help build ASI into an even more successful advertising research unit and thereby accelerate the growth of Ipsos Mori as a whole. His appointment is an important investment in the development of our advertising business."
Ipsos ASI provides research in the run-up to advertising launches, as well as analysing the impact of touchpoints on a brand.
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