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Our Team

One South, is supported by practitioners and researchers with strong methodological and practice-specific expertise. We build teams of diverse specialists to develop and carry out targeted and inclusive research designs.

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Andrés is a Founding Partner & Senior Consultant at One South. He is a monitoring, evaluation and learning specialist and has led several evaluations for education, agriculture and health programs. Andrés has significant expertise in advanced statistical methods and evaluation design. Andrés currently leads the following divisions at One South: Research, Professional Development, and Quality Assurance.

Tariq is a Founding Partner & Senior Consultant at One South. He is a monitoring, evaluation and learning specialist and has led evaluations for education, health, and advocacy projects and programs. As well as having advanced statistical training, Tariq has significant experience designing and implementing participatory research approaches. He currently leads the following divisions: Account Management, Business Development, and Operations.

Marieke holds a PhD in Cross-Cultural Psychology and is currently a Post-Doctoral Researcher at the University of Hagen. Her research concerns topics of education and psychology in a cultural perspective. At One South, she has developed and adapted psychometric measures  for evaluation and planning purposes. She has supported several evaluations for projects targeting pyscho-social, educational and behavior change outcomes.

Joanna Seth-Smith

Jo is a development practitioner with significant experience managing and coordinating sexual and reproductive health education programming for organizations in Malawi. Jo was previously the Head of Education for Theatre for a Change, an SRHR and gender-focused organization, where she managed a portfolio of seven projects focusing on education and advocacy around SRHR, gender equality, GBV and child protection.


Eva is development management specialist, with a strong background answering evaluation questions related to effectiveness and efficiency. At One South, she has supported project evaluations targeting behavior change and education outcomes. Eva previously provided technical assistance to the Office of Evaluation and Oversight at the Inter-American Development Bank.

Mariana is an anthropologist with specialized experience working in health promotion and behavior change. She has previously supported health projects in rural Kenya, Iraq, Brazil, and Venezuela. At One South, Mariana provides expert guidance on qualitative methods and analysis, and ethnographic approaches to research and evaluation. Mariana is currently completing her second masters degree in Sexology. 

Tony de Silva

Tony provides both quantitative and qualitative analysis support to a wide-range of projects at One South. He holds a MA in Comparative Local Development from the Corvinus University of Budapest in partnership with the University of Regensburg, the University of Trento and the University of Ljubljana. His previous research has examined the effectiveness of different approaches to integrate Hungary’s Roma population. Tony also holds a BA in Business and Non-Profit Management from Earlham College.

Associate Consultant

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