Omnicom Health CEO Dana Maiman to Exit November 6
Maiman's departure follows an 11-month tenure, with Tom Schwenger named to lead Omnicom Health's marketing business.
Updated on Nov. 2, 2026 in Healthcare
Dana Maiman, CEO of Omnicom Health, is leaving her role on Friday, November 6, 2026, after serving 11 months in the position. Tom Schwenger, formerly president and COO of Veeva Systems, will oversee Omnicom Health's marketing business.
Why it matters
The leadership change comes as Omnicom works to integrate the healthcare units of its holding company following the late 2025 closing of its acquisition of IPG. Omnicom Health is also searching for a new leader for its Specialty business, which is currently under interim leadership.
Dana Maiman served 11 months as CEO of Omnicom Health, which follows an IPG Health unit that at its peak oversaw more than 40 agencies and 6,500 employees. A permanent successor for the Specialty business has not yet been identified.
The players
Omnicom Health
The healthcare division of the advertising and marketing holding company Omnicom, which was named Healthcare Network of the Year at the 2026 MM+M Awards.
Dana Maiman
Outgoing CEO of Omnicom Health who previously led IPG Health before the merger of the two holding companies.
Tom Schwenger
Incoming leader of Omnicom Health's marketing business, with three decades of experience scaling healthcare commercial operations, formerly of Veeva Systems and Accenture.
Michael Larson
Interim leader of Omnicom Health's Specialty business while the company searches for a permanent successor.
The details
Maiman, who previously served as CEO of IPG Health, will leave her role on her final day, Friday, November 6. Tom Schwenger joins Omnicom Health from Veeva Systems, where he was president and COO, and previously held a managing director position at Accenture.
Timeline
Late 2025: Omnicom closed its acquisition of IPG.
September 2019: Schwenger began as president and chief customer officer of Veeva.
August 20: Veeva announced Schwenger's resignation, effective October 2.
Friday, November 6: Maiman's final day as Omnicom Health CEO.
Market Landscape
The reshuffling follows Omnicom's merger with IPG, which together with the combined holding company's nearly $2 billion in 2024 revenue positions the group among the largest players in healthcare marketing. Leadership moves like this one are central to how the consolidated firm competes against other large agency networks serving pharmaceutical and health clients.
For clients and partners working with Omnicom Health, the change in leadership on November 6 may affect day-to-day account contacts and strategic direction for the marketing business. The Specialty business will operate under interim leadership until a permanent successor is named.
The takeaway
Leadership transitions during large holding-company integrations often signal where a company is refocusing its operations. Clients following Omnicom Health should watch for the permanent appointment to the Specialty business as a further indicator of the group's direction.
What happens next
Omnicom Health's search for a permanent leader of its Specialty business is ongoing, with Michael Larson serving as interim leader until an appointment is made.
Further reading
For more on how the industry is evolving, explore Healthcare coverage on Wisevoter.
