Omnicom Appoints CEO of Omnicom Health Marketing

Omnicom has appointed Tom Schwenger as CEO of Omnicom Health's marketing business. The leadership change takes effect immediately and sees Tom take over the unit previously reporting to Dana Maiman, who is leaving the company.

“I want to thank Dana for her leadership of Omnicom Health, and before that, IPG Health,” says Michael Larson, Chairman of Omnicom Health. 

“Her contributions to our agencies, clients and our people extend well beyond her critical role in bringing our two companies together. We are grateful for the strong organisation she helped build.”

In his new position, Tom will oversee Omnicom Health's global marketing agencies. 

Working alongside agency leaders and integrated client leads, he will develop client engagement models tailored to the needs of pharma, biotech and consumer healthcare clients. 

These models will be underpinned by data platforms Omni and Acxiom, and Tom will coordinate his leadership transition with Michael. 

“I'm excited to welcome Tom to the leadership team,” says Michael. “He brings three decades of experience scaling commercial operations in the healthcare industry, along with a proven ability to drive transformative growth through technology and AI and build high-performing teams. 

“That combination makes him ideally suited to lead our marketing business.”

Driving technological growth

Tom brings over 35 years of experience growing businesses and leading strategic initiatives across the healthcare sector. He joins from Veeva Systems, where he held the role of President and Chief Customer Officer. 

During his tenure, he tripled revenue and drove early adoption of AI across the life sciences industry. Prior to this, Tom spent nearly three decades at Accenture – where he went on to lead its life sciences practice.

“I'm excited to join Omnicom Health at such a pivotal moment, leveraging the scale and capabilities of the newly combined organisation to help clients navigate the rapid transformation across the pharma, biotech and healthcare sectors,” says Tom. "This internal evolution, coupled with powerful market dynamics, creates an extraordinary opportunity to drive innovation and growth. I look forward to working closely with Michael and the talented teams across Omnicom.”

A leadership transition

Dana is stepping down after leading the newly formed Omnicom Health for less than a year. 

Her tenure as CEO followed Omnicom's acquisition of Interpublic Group (IPG) in November 2025, prior to which she held a long-standing leadership role at IPG Health and FCB Health.

“I'm incredibly proud of the organisation we've built at Omnicom Health and of the teams who make it such a special place,” says Dana. “It has been a privilege to work alongside our agencies, clients and people through this important chapter. 

“I'm leaving with confidence in the strong leadership team and its ability to build on our momentum and continue delivering for clients.”

Who are Omnicom’s key partners?

• Adobe: Omnicom and Adobe expanded their global partnership in April 2026 to co-develop an enterprise-grade, industry-specialised AI Agentic Operating Model solution for global brands.
• Google Cloud: Omnicom's strategic partnership with Google Cloud integrates advanced Gen AI and cloud capabilities directly into Omnicom's open operating system, Omni.
• Microsoft: Omnicom's partnership with Microsoft centres on integrating Azure OpenAI and ChatGPT, as well as Microsoft Advertising solutions, into Omni.
• Unisys: Omnicom partnered with Unisys to execute a massive global IT and cloud transformation that connects 70,000 creative professionals across 70 countries.