Sian Whitnall is CEO of OMD Australia, leading the nation’s largest media agency renowned for creativity and effectiveness. With a strong digital and technology background, she drives innovation and growth for Australia’s leading brands.

Since joining OMD in 2013, Whitnall has held senior leadership roles including Chief Digital Officer, where she developed OMD’s global data transformation framework. Under her leadership, OMD launched the bold positioning ‘We Create What’s Next’, sparking cultural transformation and delivering standout results in 2025. OMD retained client partnerships valued at $750m without pitching, welcomed new partners including Kimberly-Clark and Freedom, and consolidated growth with long standing clients. The agency also advanced AI powered capabilities through Omni and reinforced its position as Australia’s highest billing media agency for the eleventh consecutive year.

Committed to making digital, data and tech education accessible, Whitnall has contributed to industry bodies including IAB, AANA and MFA, and mentors emerging leaders through MFA5+.