Dentons U.S. CEO Mike McNamara, and Mary Wilson, the firm's new U.S. managing partner.

Dentons, the world's largest law firm, announced Monday that Wilson, who joined the firm as a lateral partner 14 years ago, would be stepping into the role vacated when Washington, D.C.-based Mike McNamara became U.S. CEO.

McNamara, as U.S. CEO, will continue his leadership of the firm's strategic and administrative operations in the country, in a role that connects to the firm's global platform. As U.S. managing partner, Wilson will focus on supporting practice leaders and enhancing their ability to deliver client service.