• Academic Council on the United Nations System (ACUNS)
• AFK e.V. (Arbeitsgemeinschaft der Friedens- und Konfliktforschung) (German Association of Peace and Conflict Researcher)
• Deutsche Gesellschaft für Politikwissenschaft (DGfP)
• European International Studies Association (EISA)
• German Platform for Peaceful Conflict Management (Plattform Zivile Konfliktbearbeitung)
• International Studies Association (ISA)
• International Humanitarian Studies Association
   

• Member of the African Human Security Index (AHSI) Advisory Group, led by the African Union Commission (AUC), the United Nations Trust Fund for Human Security (UNTFHS) and the United Nations Economic Commission for Africa (UNECA)
• Advisor for the Master of International Relations and Diplomacy, University of Trier, Germany
• Erasmus coordinator of the Department of Political Science, University of Trier
• Member of the Council of the Graduate Center University of Trier (GUT), Central Scientific Institution of the University of Trier
• Substitute member of the Advisory Board for International Affairs of the University of Trier
• Substitute member of the sub-council PROMOS (Advisory Board for International Affairs of the University of Trier)
• Substitute member of the Examination Board Bachelor/Master Political Science, University of Trier
• WAP/EDV Representative of the Department of Political Science, University of Trier

In addition, Dr. Sascha Werthes regularly acts as a reviewer for various scientific journals and foundations.