McDonald (pictured) spent six years at System1/BrainJuicer, most recently as president of the Americas and Asia-Pacific.

He has previously held senior roles at Nielsen NeuroFocus, SpectraComm and Maritz.

Delineate was founded in 2016 and has offices in London and Manchester and an operations centre in Wales. 

James Turner, founder and chief executive at Delineate, said the company’s clients include “global multinationals with large operations in the Americas” and companies “looking for opportunities globally”.

Turner added: “It made sense for us to expand our client facing presence in the US, to deliver the power of our real-time data services to brands. Jeff’s experience and enthusiasm for our brand promise was the perfect fit for our ambitions to grow the business.”