Wilkinson previously worked for agency Zibrant for eight years, where she held the role of global director of business development in healthcare.
Her recent responsibilities there included leading a team of account managers, overseeing and leading the development of pharmaceutical accounts and the delivery of the Healthcare Meetings Forum.
Des Mclaughlin, group managing director for Grass Roots Meetings and Events, said: "Hannah is very highly regarded by all who have worked with her and has a proven record of success in everything she has done.
"She will play a pivotal role in bringing our account teams together and helping to cement our meetings and events business as one, in line with our plans.
"We always want to recruit the best in our industry and Hannah’s appointment fully reflects this."
Hannah will join the board of the company and will divide her time between the Putney, Marlow, Fleet and Worcester offices, in addition to working with the wider Grass Roots Group teams overseas.
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