The consultant will be responsible for the following tasks: 1) Coordination of the production of the web-based segment of WDR 2025: - Coordinate the development of the web-based segment of WDR 2025 and supervise the production of its different parts: format, layout, Power-BI functionalities, and substantive content on drug demand and drug supply; - Produce a development plan for WDR 2025 edition of the web-based segment and ensure the team adheres to it and implements it; - Coordinate the prepublication of the ARQ data; - Ensure all data and analyses of the web-based element of WDR 2025 are up to date, relevant and based on good methodology; - Ensure that content is produced on time and reviewed internally and externally; - Ensure all maps of WDR 2025 are reviewed by the Geospatial Unit of the UN Secretariat; - Supervise the team’s input into other WDR 2025 Special Points of Interest and Key Findings and Conclusions; 2) Production of the analysis on drug demand and health consequences for WDR 2025: - Cary out a comprehensive review of the literature, both scientific (published in peer-reviewed journals) and grey (national reports and other accessible publications), and of available data from international, regional and national institutions or organizations, including from the annual report questionnaire; - Develop an outline of the online segment of the WDR; - Analyse available data and produce global, regional and national estimates; - Produce a first draft of the charts, maps and tables to be included into the online segment of the WDR; - Develop a narrative for each topic to highlight key findings for the online segment; - Produce a final draft of the charts, maps and tables to be included into the online segment of the WDR as well as a final narrative for each topic to highlight key findings for the online segment; - Produce the text of the Key Findings and Conclusions on drug demand and health consequences; - Review and contribute to the text of the Special Points of Interest on drug demand and health consequences;