Huntsworth Health, the health and science division of international PR group Huntsworth, has promoted two of its agencies’ senior executives, Maryellen Royle and Jon Clark, to the role of global chief executive officer.

Maryellen Royle
Maryellen Royle
Royle has been named global CEO of Huntsworth healthcare agency Tonic Life Communications. Royle, who previously led the North American practice for Tonic as President, North America, will now be responsible for integrating and expanding the Philadelphia- and London-based agency’s offerings on a global scale.


Prior to joining Tonic in 2009, Royle was stationed at Huntsworth property Dorland Global Corporation, where she worked for nearly 18 years.

Jon ClarkJon Clark

Clark has been listed as global CEO of healthcare agency nitrogen. Formerly nitrogen’s managing director, Clark was responsible for founding nitrogen London in 2008. He was previously an associate director at Huntsworth Health.

As nitrogen global CEO, Clark will lead the growth and development of the agency's worldwide team with a focus on its New York and London offices.

Royle and Clark both report to Huntsworth Health global CEO Neil Matheson.

Huntsworth Health is London-based Huntsworth’s largest division.