What you need to know:

• M&C Saatchi has appointed Sian Cook and Michael McEwan as joint managing directors.
• The two joint leaders replace outgoing Group MD Russell Hopson

Sian Cook, managing partner of M&C Saatchi Sydney and MD of M&C Saatchi Melbourne, Michael McEwan, have been appointed joint managing directors of the AUNZ advertising business.

Current leader Russell Hopson will exit as group managing director, with M&C Saatchi AUNZ CEO, Justin Graham, confirming Hopson had chosen to leave the business after four years at the helm.

"Russell is a passionate leader with strong relationships both internally and externally. We thank him for his commitment and contribution to the business," Graham said.

“Sian and Michael are already an integral part of our business, partnered because of a shared ambition to drive creativity across all parts of our business, and a consistent focus on helping our partners achieve incredible growth."