Burson Names Tiller US Influence & Social Chair; Setsiadi Takes APAC

Burson has named Davitha Tiller US chair of influence and social, effective Nov. 30. She joins from Havas, where she most recently held a leadership role at Havas Health Network.

Tiller brings more than ten years of social, influencer and integrated communications experience across APAC and the US. She began her career in Australia before joining Havas Red.

The agency also named Yuliani Setiadi APAC head of influence and social. Setiadi is based in Singapore. She previously served as head of digital for Southeast Asia at Edelman. She will establish Burson's APAC influence and social centre of excellence and lead regional execution of the firm's global strategy.

What does this change for practitioners?

The appointments complete a regional leadership structure under Matt Buchanan, global chief influence and social officer. Tiller, Setiadi and Olly Gosling, EMEA head of influence and social, all report to Buchanan. Vikki Chowney continues as global head of influence and social and works closely with Buchanan to advance the agency's worldwide approach.

Buchanan framed the hires around a shift in how reputation is built. "Reputation is no longer built through a single channel, format or voice, but through ideas that originate in culture and society, travel through communities and stakeholders, and earn attention across every platform," he said. "With Yuli and Dav joining Olly and Vikki, we now have the leadership in place across our regions to bring that vision to life for clients at scale."

The claim deserves context. Burson, formed from the 2024 merger of BCW and Hill & Knowlton, has moved quickly to rebuild practice leadership across regions. Influence and social is a crowded field. Every major holding-company agency claims integrated, culture-led programming. Tiller and Setiadi will carry the burden of proving the structure produces results.

Other moves across the industry

• FINN Partners promoted Christina Gnozzo, Natalie Wayt and Chad Belisario to partner in its North American Travel Practice.
• Bospar named Becky Quinlan content director for cybersecurity, enterprise infrastructure and SaaS.
• OnMessage Public Strategies hired Sarah Ursprung as VP. Ursprung previously served as chief of staff for legislation and congressional affairs at the Department of Education.
• APCO named Bruce Fu executive director leading its expanded Global China offering. Fu has been with the agency since 2010, most recently as managing director, Beijing.
• Interluxe appointed Florence Quinn partner and strategic advisor. Quinn led Quinn PR as president for 37 years. Interluxe Group acquired Quinn in August 2025.
• Shore Fire Media, a subsidiary of Dolphin, promoted Jaclyn Childress to president.
• Stagwell appointed Kate Richling chief brand and communications officer of Stagwell Media. She joins from Monks.
• Osaic named Manish Shrivastava CMO. He spent more than 12 years as CMO of homebuilder PulteGroup.
• The Houston Livestock Show and Rodeo hired Clint Pasche as CMO. Pasche was chief marketing and communications officer at Greater Houston Partnership.
• Terra Security, which builds AI agents for offensive security and continuous penetration testing, appointed Tal Kapulnik CMO.
• Gainbridge, which sells annuities directly to members without agents or commissions, named Peter Bishop VP of marketing.
• Tannenbaum Helpern, a New York business law firm, named Damien Cohen chief marketing and business development officer.

For communications teams watching the market, the pattern is consistent. Agencies are consolidating influence and social leadership regionally. In-house buyers are recruiting CMOs with deep sector tenure rather than generalist marketers.