Jillian Janaczek

Jillian Janaczek is a seasoned communications and public relations executive who assumed the role of Americas CEO at FleishmanHillard in 2026, following the strategic consolidation of Porter Novelli into the FleishmanHillard network. Her appointment marked a significant moment in the Omnicom-owned agency's restructuring efforts, bringing together two storied PR brands under a unified leadership structure. Janaczek is recognized for her ability to navigate complex organizational change while maintaining client relationships and talent retention. Prior to her current role, Janaczek served as CEO of Porter Novelli, where she led the agency through a period of significant transformation, repositioning its offerings around purpose-driven communications and integrated marketing. Her tenure at Porter Novelli demonstrated her capacity to modernize legacy agency models in response to shifting client demands, digital disruption, and evolving media landscapes. She has been a vocal advocate for data-informed communications strategies and the integration of earned, owned, and paid media. With a career spanning major holding company agencies, Janaczek brings deep expertise in corporate communications, brand strategy, and integrated marketing communications. While her background is rooted in PR rather than core AdTech infrastructure, her work increasingly intersects with advertising technology through data-driven audience targeting, measurement, and the convergence of paid and earned media strategies that define modern communications practice.

Last updated Jul 10, 2026 by ATDb automated enrichment · Connections updated Jul 13, 2026