Aga Khan University Hospitals in Karachi, Pakistan and Nairobi, Kenya are private, not-for-profit institutions providing high quality health care. The Main Hospitals serve as the principal sites for clinical training for the University's Medical Colleges and Schools of Nursing and Midwifery in Pakistan and East Africa. Our Vision of Aga Khan University Hospital, Nairobi is to be the premier, tertiary, teaching and referral health care facility in sub-Saharan Africa. ​For over fifty years, Aga Khan University Hospital, Nairobi (AKUH) has been taking care of families in East Africa. As a private, not-for-profit hospital, we strive to provide access to quality healthcare to all who need it. At AKUH, patients are our first priority. Our team of medical professionals, faculty and staff are here to provide you and your loved ones with the highest standards of healthcare. We are committed to working together to ensure that you and your family receive outstanding medical services, first-rate facilities and compassionate care. The Aga Khan University Hospital, Nairobi has set the standard for comprehensive healthcare and modern medical education in East Africa. Our dedicated staff, advanced facilities and state-of-the-art technologies have earned the hospital great reputation as a leading medical institution and teaching hospital in the region, and beyond. Patients benefit from our unique team-based approach to car​e, which enables you to benefit from the diverse expertise of our entire team of medical professionals. As the teaching hospital for Aga Khan University’s Medical College and School of Nursing and Midwifery, we practice an evidence-based approach to medicine, driven by the cutting-edge research conducted by our experienced faculty members. Our approach to care is guided by our core principles of Quality, Access, Impact and Relevance.​Role Summary The Longitudinal Study of Health and Ageing in Kenya (LOSHAK) is a flagship population-based cohort platform designed to generate high-quality evidence on ageing, cognitive health, and life-course transitions in low- and middle-income country (LMIC) contexts. LOSHAK integrates large-scale household surveys, cognitive assessments, biomarker data, and contextual social and environmental information, and is embedded within regional and global networks on ageing and health. The Postdoctoral Research Fellow who has completed a PhD in Epidemiology, Population Health, Public Health, Demography, Biostatistics, or a closely related field is ideal for an early-career scientist seeking advanced training and leadership in survey research, ageing, and cognitive epidemiology in LMICs, while contributing substantively to a world-class longitudinal cohort platform. The Postdoctoral Fellow will lead, and co-lead high-impact research embedded within LOSHAK, contributing to: Design and implementation of large-scale ageing and cognition survey components. Advanced epidemiological analysis of cognitive ageing and later-life health. Methodological innovation in longitudinal and survey-based research in LMICs. High-quality scientific outputs and grant development. Supervision and mentorship of PhD students and junior researchers. Development of funding proposals. Design nested studies within the cohort. The role bridges independent scholarship with platform leadership, positioning the Fellow for a competitive academic or research career. Key Responsibilities Research leadership & design Co-lead development of LOSHAK sub-studies in ageing and cognition; refine research questions and analytical frameworks; support ethics and regulatory submissions. Survey & field systems Lead design, piloting, and optimization of ageing and cognitive survey modules; support field training and QA Data analysis & methods Conduct advanced analyses of longitudinal and survey data; develop reproducible analytical pipelines; contribute to harmonization with global cohorts. Scholarly outputs Lead and co-author peer-reviewed manuscripts; present findings at scientific fora; contribute to policy briefs. Grant development & platform growth Contribute to proposal development and donor engagement; support expansion of LOSHAK research portfolio. Mentorship & team engagement Supervise PhD and MSc students; mentor research staff; engage multidisciplinary teams. Professional development Build an independent research profile in ageing and cognitive epidemiology; pursue advanced training. Required Qualifications PhD in Epidemiology, Population Health, Public Health, Demography, Biostatistics, or related field. Demonstrated expertise in quantitative and epidemiological methods. Track record of peer-reviewed publications. Strong interest in ageing, cognition, or life-course health. Ability to lead components of complex, multi-site research. Excellent academic writing and communication skills. Relevant Experience Experience with large-scale population surveys or longitudinal cohorts. Familiarity with LMIC research environments. Experience in cognitive assessment or mental health research. Exposure to grant writing and collaborative research networks. Personal Characteristics & Behaviours Demonstrates high scientific integrity and attention to detail.  Strong analytical and problem‑solving skills.  Strong communication skills. Culturally sensitive and adaptable in diverse environments.  Committed to mentoring and continuous professional development.