Since 2010, Margianta has been working closely with grassroot and high-level networks, particularly on youth participation, global health, and social justice in Low-Middle Income Countries (LMICs). For years, Margianta was a tobacco control advocate who helped to co-initiate the FCTC Youth Movement and Indonesian Youth Council for Tactical Change. Margianta also led the Young Health Programme for 3 years at Lentera Anak Foundation to promote NCDs prevention, and served at UNFPA Youth Advisory Panel to promote Comprehensive Sexuality Education. Through his non-profit Emancipate Indonesia, Margianta has been promoting decent work and mental wellbeing for young workers with various campaigns, research, and advocacy. Throughout the years, Margianta has been invited to speak about the importance of mental wellbeing for working class youth at UNICEF Leading Minds Conference, Global Mental Health Summit, and Nobel Prize Dialogue. Some his recent affiliations include his role as a UNICEF HQ consultant to support the rollout of UNICEF Youth Advocacy Guide (YAG) and provide inputs for UNICEF Young People’s Participation and Mental Health: A Protocol for Practitioners document.