Belli replaces Band & Brown Group co-founder Gill Brown, who has taken the role of chief executive officer.
Belli will focus on the agency's development into new markets, while Brown will hold group-wide responsibility for both consumer and experiential agency Brando and Band & Brown Communications.
Meanwhile, Brando has brought in Jamie Burke as its new head of digital.
Burke has been tasked with expanding Brando's digital offering and overseeing the creation of a specialist social media division.
Burke was previously a lead digital consultant at ad agency JWT and has worked across global accounts including Kraft and Shell Retail.
Band & Brown Belli promoted to MD
Band & Brown Group has promoted board director Graz Belli to the role of managing director.
