Dhol Samuel Ayuen is a medical doctor from South Sudan. He holds a Bachelor of Medicine and Bachelor of Surgery from Makerere University in Kampala, Uganda, and a certificate in Global Health from Leiden University, in the Netherlands. He also holds a Master of Science in International Health and Tropical Medicine from the University of Oxford.

Before joining IDDO, Dhol was a medical doctor providing medical and surgical services in Kampala, Uganda and Juba, South Sudan. He mainly treated tropical infectious diseases like Malaria, HIV/AIDS and opportunistic infections, tuberculosis, leishmaniasis, schistosomiasis and other neglected tropical diseases (NTDs) and provided clinical services to women and children. He also provided surgical, obstetrics and gynaecological and paediatrics services to the internally displaced persons (IDPs) on the outskirts of the South Sudanese capital, Juba.

Dhol joined IDDO/WWARN in 2023 as an Evidence Synthesis Officer working on the Severe Malaria project, Molecular markers of antimalarial resistance surveyors and the WWARN Clinical Trials Publication Library.

He has since November 2023 been working  as a Project Manager for malaria research projects. These projects include the WWARN living systematic reviews, WWARN Clinical Trials Publication Library and its surveyor and the Molecular surveyors ,Renal impairment in severe malaria ,Correlation between the K13 genotype and clinical phenotype ,Ivermectin pharmacokinetics in children and adults study groups among others.

 He is passionate about research and evidence-based medicine and it is this passion that has driven him to garner more skills ,knowledge and experience through engaging in research that would provide evidence to inform health policies and translate policies into practice.