Bro. Mubiru Daniel Musisi serves as the Representative of Informal Economy Workers at the National Organisation of Trade Unions (NOTU). In this role, he champions the rights and interests of workers operating in informal sectors, such as small-scale trading, casual labor, and other non-formal employment arrangements, ensuring they are included in union advocacy and policy initiatives.

He actively engages in capacity-building programs, awareness campaigns, and collective discussions aimed at improving working conditions, social protection, and income security for informal workers. Through his work, Bro. Mubiru contributes to creating a stronger, more inclusive labor movement that recognizes and supports all categories of workers in Uganda.