Osborn becomes national head of investment, while Lam moves into Osborn's former role as head of investment in Sydney.
Krivtchoun has worked in leadership positions across Publicis Groupe ANZ for over eight years.
"The way Arnott's and The Neighbourhood work is a really clear KPI structure, we're all celebrating the results we're getting."
Hewitt will begin her new role in January while continuing to lead Spark Foundry ANZ.
The network showcased its "massive" new announcements for the year ahead as part of the SXSW Sydney
Imogen Hewitt: "We all have plenty of data, so it’s about how you best use it as one of the key ingredients...
The partnership sees Arnott’s biscuits integrated throughout the season and feature activations from the show
UM has won August with its campaign for Hahn placed throughout City2Surf run
Mediaweek sits down with CEO Imogen Hewitt and CSO Caroline Hugall
Plus: her valuable start in the industry in London and advice to women who want to scale up in the industry
Hugall joins Spark Foundry with close to 20 years’ experience
The trio also discussed inspiring women-driven initiative and improvements the industry can make
The appointment follows a recent media review
Hewitt: "Do I have my eyes on the top 10? Without a doubt, I do"