Sian O'Halloran
Assistant Producer at Havas Tonic
Others working in Havas Tonic
Thomas Funk
Managing Director Europe, Chief Executive Officer Group Germany at Havas Group
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Gunter Hofstotter
Chief Financial Officer at Havas Group
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Carmen Roca
Chief Executive Officer at Havas Group
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Jaroslaw Nowicki
Group Chief Financial Officer at Havas Group
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