S4 Capital has appointed Nirvik Singh to the new role of CEO EMEA Marketing Services at its agency Monks.  

He spent more than three decades at WPP’s Grey Advertising, most recently as COO, Grey Global. Prior to that he was Chairman and CEO of Grey Group Asia Pacific, Middle East and Africa. 

He left Grey in 2025 and joined the S4 Capital board of directors at around that time. Now that he is taking a fulltime executive position at the company, he has stepped down from the board. 

Reporting to Bruno Lambertini, Monks CEO, Marketing Services, Singh will lead the region's business, bringing together brand strategy, creative craft, content orchestration, and data-driven media into a unified go-to-market proposition.