Andrew Robertson will lead Omnicom Advertising, the holding company's consolidated advertising division, succeeding Troy Ruhanen who is retiring after leading the unit since its formation. The appointment places Robertson atop the group's 160+ agencies across BBDO Worldwide, DDB Worldwide, and TBWA Worldwide—representing roughly $7.9 billion in combined annual revenue based on recent regulatory filings.
Ruhanen joined Omnicom in 2020 from Dentsu Aegis Network and structured Omnicom Advertising as a distinct reporting segment separate from Precision Marketing and Commerce & Brand Consulting. Robertson has led BBDO Worldwide since 2012, during which the network added $2.1 billion in net new business and secured holding positions with Volkswagen, Mars, and P&G's Gillette. He remains based in New York and will report directly to Omnicom CEO John Wren. Ruhanen's departure timing aligns with Omnicom's integration of Interpublic Group, a $13.2 billion transaction announced in December that is expected to close in Q2 2025 pending regulatory clearance in Brussels and Beijing.
The succession removes one layer of ambiguity for clients managing multi-agency rosters under Omnicom's structure. Family offices allocating marketing budgets across legacy creative networks and performance-media divisions now have a single point of escalation for the advertising segment, which still generates 54% of Omnicom's organic growth despite declining share versus precision marketing. Robertson's tenure at BBDO demonstrated fluency in both brand-building and procurement negotiation—he personally led the $800 million Mars pitch in 2019 and retained P&G's Gillette business during a $1.2 billion consolidation review in 2018. His appointment suggests Omnicom will maintain distinct creative and data operations rather than collapse agencies into undifferentiated service lines, a structure that appeals to heritage brands wary of commoditization but frustrates efficiency-focused procurement teams.
The timing matters for luxury and hospitality allocators finalizing 2026 agency relationships. Omnicom Advertising handles creative for 11 of the top 50 global hotel groups and 8 of the top 20 luxury conglomerates by media spend. Robertson's first 90 days will likely include executive visits to Paris, Shanghai, and Dubai to reassure clients concerned about integration distraction. Watch for senior departures at DDB and TBWA in Q2 2025 as executives assess their standing under the new structure—those moves typically precede client defections by 60-90 days. Omnicom has scheduled investor meetings in March and May that should clarify how IPG's McCann and FCB networks will map onto the existing advertising division.
Robertson's BBDO replacement has not been announced, and that vacancy will determine whether Omnicom centralizes P&L authority or maintains network autonomy. His appointment becomes effective immediately.