Resume

Author

Marothi Peter LETSOALO

Date updated

25 March 2026

Biostatistician | Data Scientist | Public Health Analytics

Johannesburg, South Africa | marothi.letsoalo.001@gmail.com | LinkedIn | ORCID: 0000-0003-2170-6312

Professional Summary

A highly motivated and results-oriented Biostatistician and Data Scientist with over 7 years of experience in designing, analyzing, and reporting on clinical trials and cohort studies, including extensive work with large and complex longitudinal datasets. Passionate about leveraging advanced statistical methodologies, particularly in R, to drive evidence-based decision-making in health research. Proven ability to lead statistical planning, create linked datasets, and contribute significantly to scientific publications. Adept at collaborating with multidisciplinary teams to deliver impactful research findings, with a keen interest in contributing to mental health research. Committed to clear communication and fostering a culture of data-driven research through mentorship and training.

Field & Skills Highlights

Biostatistics | Bioinformatics | Data Science | Pharmacometrics | Clinical Research | Clinical Data Management | Generative Artificial Intelligence| Statistical Analysis & Modeling | Dataset Management | Clinical Trials | Epidemiology | Healthcare Analytics | Public Health | Data Visualization | Automated Reporting | Scientific Collaboration | Scientific Communication | Mentorship

Core Skills

  • Highly analytical and results-oriented professional with advanced proficiency in statistical analysis and modeling using R (including pipeline development), SAS (including macro development), Python, and Stata.
  • Proven expertise in end-to-end dataset management, from extraction, cleaning, and processing to validation and the creation of complex linked and harmonized datasets using R, Python, SAS, and SQL.
  • Comprehensive experience in the design and execution of clinical trials and epidemiological studies, including study design, statistical analysis plan development, sample size calculation, randomization, and analysis of diverse public health data (HIV, TB, COVID-19, mental health).
  • Skilled in translating complex data into actionable insights through automated reports with Quarto and interactive dashboards with R Shiny.
  • Strong scientific collaborator and mentor with a record of co-authoring peer-reviewed publications, presenting research findings, and training junior statisticians.

Work Experience

Senior Biostatistician, CAPRISA, Durban, South Africa (1/2021 to 8/2025)

Strategic Study Leadership & Grant Acquisition

  • Contributed significantly to the successful acquisition of research grants totaling over R100 million by providing expert statistical input into grant proposals.
  • Spearheaded study design, statistical planning (including sample size optimization, randomization, and SAP development) for numerous clinical trials and observational studies.
  • Led analysis of large, complex longitudinal datasets to identify key predictors of health outcomes, directly informing public health interventions.

Efficiency, Innovation & Cost Savings

  • Developed and implemented R-based analysis pipelines, reducing TLF generation time by over 90%.
  • Insourced previously outsourced statistical work, achieving organizational cost savings exceeding R1.5 million.

Public Health Crisis Response & Reporting

  • Led the CAPRISA Epidemic Intelligence Unit, delivering critical, timely data analysis, statistical insights, and interactive visualizations to guide public health responses during major events like the COVID-19 pandemic.

Advancing Research & Data Quality

  • Co-authored numerous peer-reviewed scientific manuscripts by providing expert statistical guidance and ensuring methodological rigor.
  • Contributed vital statistical input into study database design, data validation, and quality control measures.

Capacity Building & Mentorship

  • Fostered a robust data-driven research culture by providing regular training and mentorship to CAPRISA scientists and fellows on advanced statistical methodologies, data visualization, and effective research communication.

Research Data Manager, VLIR-OUS, University of Limpopo, South Africa (6/2016 to 3/2019)

  • Managed complex clinical and epidemiological datasets, ensuring data integrity, accuracy, and implementing robust quality control procedures.
  • Developed and maintained SQL databases to optimize clinical research data collection, validation, and analysis.
  • Trained and supported research teams in data management and analysis best practices, enhancing overall project efficiency.

Junior Lecturer, University of Limpopo, South Africa (1/2015 to 5/2016)

  • Delivered lectures and tutorials in introductory statistics and research methodology to undergraduate students.
  • Mentored students on research projects, including statistical analysis and interpretation.

Faculty Researcher, University of Limpopo, South Africa (4/2012 to 12/2014)

  • Conducted statistical analyses for selected research projects, contributing significantly to study design and data interpretation.
  • Played a key role in advancing postgraduate research by reviewing student proposals and presentations, providing critical feedback.
  • Demonstrated exceptional organizational and problem-solving skills by developing a comprehensive university-wide academic timetable from scratch, encompassing all faculties and school modules.

Education

PhD in Statistics (Field: Biostatistics) | University of KwaZulu-Natal (Enrolled) July 2024 – June 2027

  • Dissertation stream: Precision Maternal Epidemiology in Obstetric HIV: A Biostatistical Framework for Latent Risk Stratification and Dynamic Prediction.
  • Research integrates latent class and trajectory modeling, causal adjustment of social risk phenotypes, and dynamic prediction of severe maternal outcomes from longitudinal obstetric data.

Master of Biostatistics (RSS Accredited) | Hasselt University, Diepenbeek, Belgium September 2018 – July 2020

  • Studies through VLIR scholarship and full time at Hasselt University in Belgium.
  • Completed with 20 biostatistics-relevant modules and a biostatistics master thesis.
  • Thesis received second prize for best development-relevant master’s thesis UHasselt 2020 (International Student category).

Master of Science in Statistics | University of Limpopo, Mankweng, South Africa January 2014 – May 2019

  • Completed with applied statistics master thesis.

Honours and Junior Degree

  • BSc (Hons) in Statistics June 2011
  • BSc in Statistics & Applied Mathematics, University of Limpopo June 2010

Specialization Certifications

  • Pharmacometrics | Pharmacometrics Africa | December 2023 – July 2024
  • Data Science & Machine Learning | MIT Schwarzman College of Computing, USA | December 2023 – April 2024

Selected Projects

CAPRISA Epidemic Intelligence Unit

  • Led data analysis across SARS-CoV-2, HIV, and other outbreaks.
  • Mined and cleaned data from multiple sources.
  • Generated insights from large, complex datasets to inform public health interventions and research strategies.

Pharmacometrics Fellowship Project

  • Balanced covariates using propensity score weighting in nonlinear mixed-effects models within a Bayesian framework.
  • Contributed to a Roche project developing a methodological framework for integrating historical controls in drug development through historical data leverage.

Certifications

  • Pharmacometrics (PMx Africa)
  • Data Science and Machine Learning (MIT) Verify
  • Clinical Trials Programming Using SAS Verify
  • Advanced Programmer for SAS 9 Verify
  • Base Programmer for SAS 9 Verify
  • Statistical Business Analyst Using SAS 9 Verify
  • VIARES Clinical Research Data Management
  • Design and Interpretation of Clinical Trials (John Hopkins University)
  • ICH Good Clinical Practice E6 (R2)
  • Designing Big Data Healthcare Studies Part I Verify
  • Designing Big Data Healthcare Studies Part II Verify

Publications

Analysis of Longitudinal Teenage Pregnancy Data of Mpunkunyoni, Kwazulu-Natal Using Generalised Linear Mixed Model. 2021.
Asparouhov, Tihomir, and Bengt Muthen. 2014. “Auxiliary Variables in Mixture Modeling: Three-Step Approaches Using Mplus.” Structural Equation Modeling: A Multidisciplinary Journal 21 (3): 329–41. https://doi.org/10.1080/10705511.2014.915181.
Asparouhov, Tihomir, and Bengt Muthen. 2024. “Mixture Modeling with Individual Measurement Times.” Mplus Technical Report. https://www.statmodel.com/download/Tscores.pdf.
Bakk, Zoltan, and Jeroen K Vermunt. 2014. “Robustness of Stepwise Latent Class Modeling with Continuous Distal Outcomes.” Structural Equation Modeling: A Multidisciplinary Journal 21 (1): 20–35. https://doi.org/10.1080/10705511.2014.955104.
Bauer, Daniel J., and Patrick J. Curran. 2003. “Distributional Assumptions of Growth Mixture Models: Implications for Overextraction of Latent Trajectory Classes.” Psychological Methods 8 (3): 338–63. https://doi.org/10.1037/1082-989X.8.3.338.
Bodley, Nicola, Jienchi Dorward, Jessica Naidoo, et al. 2023. “Diagnostic Accuracy of the Alere Afinion AS100 Point-of-Care Assay to Screen for Noncommunicable Diseases Among People Living with HIV.” JAIDS Journal of Acquired Immune Deficiency Syndromes 92 (1): e1–3. https://doi.org/10.1097/qai.0000000000003098.
“COVID-19 Vaccine Acceptability Amongst South African Pharmacists.” 2023. SA Pharmaceutical Journal.
Dhindayal, Sherishka, Marothi P. Letsoalo, and Tanuja N. Gengiah. 2022. “Mental Health Outcomes and Workplace Quality of Life Among South African Pharmacists During the COVID-19 Pandemic: A Cross-Sectional Study.” Journal of Pharmaceutical Policy and Practice 15 (1). https://doi.org/10.1186/s40545-022-00463-7.
Gordhan, Bhavna G., Astika Sewcharran, Marothi Letsoalo, et al. 2022. “Detection of Differentially Culturable Tubercle Bacteria in Sputum from Drug-Resistant Tuberculosis Patients.” Frontiers in Cellular and Infection Microbiology 12 (September). https://doi.org/10.3389/fcimb.2022.949370.
Heagerty, Patrick J, and Yingye Zheng. 2005. “Survival Model Predictive Accuracy and ROC Curves.” Biometrics 61 (1): 92–105. https://doi.org/10.1111/j.0006-341X.2005.030814.x.
Lale Ngema, Senamile, Navisha Dookie, Rubeshan Perumal, et al. 2023. “Isoniazid Resistance-Conferring Mutations Are Associated with Highly Variable Phenotypic Resistance.” Journal of Clinical Tuberculosis and Other Mycobacterial Diseases 33 (December): 100387. https://doi.org/10.1016/j.jctube.2023.100387.
Le, Khoa, Johannes Clouth, and Jeroen K Vermunt. 2024. “Causal Latent Class Analysis with Distal Outcomes: A Modified Three-Step Method Using Inverse Propensity Weighting.” Multivariate Behavioral Research 59 (5): 1006–26. https://doi.org/10.1080/00273171.2024.2367485.
Lissa, C. J. Van, M. Garnier-Villarreal, and D. Anadria. 2024. “Recommended Practices in Latent Class Analysis Using the Open-Source r-Package tidySEM.” Structural Equation Modeling: A Multidisciplinary Journal 31 (3): 526–34. https://doi.org/10.1080/10705511.2023.2250920.
Mahomed, Sharana, Martin Beliveau, Roberto Heredia-Ortiz, et al. 2025. “Population Pharmacokinetics of Weight-Based Compared with Fixed Dosing of CAP256V2LS, a Broadly Neutralizing Antibody for HIV Prevention in Women.” Journal of Antimicrobial Chemotherapy 80 (8): 2135–44. https://doi.org/10.1093/jac/dkaf181.
Maseko, Thando Glory, Slindile Ngubane, Marothi Letsoalo, et al. 2023. “Higher Plasma Interleukin − 6 Levels Are Associated with Lung Cavitation in Drug-Resistant Tuberculosis.” BMC Immunology 24 (1). https://doi.org/10.1186/s12865-023-00563-2.
Naicker, Nivashnee et al. 2022. “Pregnancy Rates and Outcomes in a Longitudinal HIV Cohort in the Context of Evolving Antiretroviral Treatment Provision in South Africa.” BMC Pregnancy and Childbirth 22 (1): 596. https://doi.org/10.1186/s12884-022-04829-2.
Naidoo, Anushka, Kogieleum Naidoo, Marothi P Letsoalo, et al. 2026. “Fixed-Dose Combination Bictegravir–Emtricitabine–Tenofovir Alafenamide Twice-Daily for Treatment of HIV During Rifampicin-Based Tuberculosis Treatment (INSIGHT Study): A Phase 2b, Open-Label, Randomised Non-Comparative Trial.” The Lancet HIV 13 (1): e9–20. https://doi.org/10.1016/s2352-3018(25)00200-0.
Naidoo, Anushka, Hylke Waalewijn, Kogieleum Naidoo, et al. 2025. “Pharmacokinetics and Safety of Dolutegravir in Children Receiving Rifampicin Tuberculosis Treatment in South Africa (ORCHID): A Prospective Cohort Study.” The Lancet HIV 12 (4): e273–82. https://doi.org/10.1016/s2352-3018(24)00312-6.
Naidoo, Kogieleum, Anushka Naidoo, Alash’le G Abimiku, et al. 2024. “Triage Test for All-Oral Drug-Resistant Tuberculosis (DR-TB) Regimen: A Phase IV Study to Assess Effectiveness, Feasibility, Acceptability and Cost-Effectiveness of the Xpert MTB/XDR Assay for Rapid Triage and Treatment of DR-TB.” BMJ Open 14 (11): e084722. https://doi.org/10.1136/bmjopen-2024-084722.
Osuala, Emmanuella Chinonso, Ivan Nicholas Nkuhairwe, Marothi Peter Letsoalo, et al. 2025. “Pharmacokinetics of Twice-Daily Tenofovir Alafenamide in Adults with HIV-Associated TB on BIC/FTC/TAF and Rifampicin.” Clinical Infectious Diseases, ahead of print, December. https://doi.org/10.1093/cid/ciaf732.
Perumal, Rubeshan, Neda Bionghi, Camus Nimmo, et al. 2023a. Baseline and Treatment-Emergent Bedaquiline Resistance in Drug-Resistant Tuberculosis: A Systematic Review and Meta-Analysis. August. https://doi.org/10.1101/2023.08.07.23293687.
Perumal, Rubeshan, Neda Bionghi, Camus Nimmo, et al. 2023b. “Baseline and Treatment-Emergent Bedaquiline Resistance in Drug-Resistant Tuberculosis: A Systematic Review and Meta-Analysis.” European Respiratory Journal 62 (6): 2300639. https://doi.org/10.1183/13993003.00639-2023.
Perumal, Rubeshan, Kogieleum Naidoo, Anushka Naidoo, et al. 2023. “The Impact of Enteral Feeding and Therapeutic Monitoring of Rifampicin with Dose Escalation in Critically Ill Patients with Tuberculosis.” International Journal of Infectious Diseases 126 (January): 174–80. https://doi.org/10.1016/j.ijid.2022.11.033.
Pillay, Nashlin, Gugulethu Favourate Mzobe, Marothi Letsoalo, et al. 2024. “Performance of Softcup® Menstrual Cup and Vulvovaginal Swab Samples for Detection and Quantification of Genital Cytokines.” Journal of Immunological Methods 528 (May): 113656. https://doi.org/10.1016/j.jim.2024.113656.
Proust-Lima, Cecile, Tiphaine Saulnier, Viviane Philipps, et al. 2023. “Describing Complex Disease Progression Using Joint Latent Class Models for Multivariate Longitudinal Markers and Clinical Endpoints.” Statistics in Medicine 42 (22): 3996–4014. https://doi.org/10.1002/sim.9844.
Qulu, Wenkosi Perez, Gugulethu Mzobe, Andile Mtshali, et al. 2023. “Metronidazole Treatment Failure and Persistent BV Lead to Increased Frequencies of Activated t- and Dendritic-Cell Subsets.” Microorganisms 11 (11): 2643. https://doi.org/10.3390/microorganisms11112643.
Rizopoulos, Dimitris, Geert Molenberghs, and Emmanuel MEH Lesaffre. 2017. “Dynamic Predictions with Time-Dependent Covariates in Survival Analysis Using Joint Modeling and Landmarking.” Biometrical Journal 59 (6): 1261–76. https://doi.org/10.1002/bimj.201600238.
Schwebs, Timo, Ann-Katrin Kieninger, Lenka Podpera Tisakova, et al. 2024. “Evaluation of Metronidazole Resistance of Vaginal Swab Isolates from South African Women Treated for Bacterial Vaginosis.” Antibiotics 13 (12): 1217. https://doi.org/10.3390/antibiotics13121217.
Serunjogi, Robert et al. 2025. “Risk of Adverse Birth Outcomes and Birth Defects Among Women Living with HIV on Antiretroviral Therapy and HIV-Negative Women in Uganda, 2015–2021.” Journal of Acquired Immune Deficiency Syndromes 98 (5): 434. https://doi.org/10.1097/QAI.0000000000003596.
Setlhare, Boitumelo, Marothi Letsoalo, Siphathimandla Authority Nkabinde, et al. 2024. “Corrigendum: An in Vitro Study to Elucidate the Effects of Product Nkabinde on Immune Response in Peripheral Blood Mononuclear Cells of Healthy Donors.” Frontiers in Pharmacology 15 (April). https://doi.org/10.3389/fphar.2024.1401376.
Shivakoti, Rupak, Marothi Letsoalo, Lara Lewis, et al. 2025. “Circulating Short-Chain Fatty Acids: Association with Vaginal Microbiota, Genital Inflammation, and HIV Acquisition.” AIDS Research and Human Retroviruses 41 (12): 559–66. https://doi.org/10.1177/08892229251366174.
Taha, Taha E, Nonhlanhla Yende-Zuma, Stephen S Brummel, et al. 2022. “Effects of Long-Term Antiretroviral Therapy in Reproductive-Age Women in Sub-Saharan Africa (the PEPFAR PROMOTE Study): A Multi-Country Observational Cohort Study.” The Lancet HIV 9 (6): e394–403. https://doi.org/10.1016/S2352-3018(22)00037-6.
Tukei, VJ, HJ Hoffman, L Greenberg, et al. 2021. “Adverse Pregnancy Outcomes Among HIV-Positive Women in the Era of Universal Antiretroviral Therapy Remain Elevated Compared with HIV-Negative Women.” Pediatric Infectious Disease Journal 40 (9): 821–26. https://doi.org/10.1097/INF.0000000000003174.
Van de Schoot, Rens, Marit Sijbrandij, Sonja D. Winter, Sarah Depaoli, and Jeroen K. Vermunt. 2017. “The GRoLTS-Checklist: Guidelines for Reporting on Latent Trajectory Studies.” Structural Equation Modeling: A Multidisciplinary Journal 24 (3): 451–67. https://doi.org/10.1080/10705511.2016.1247646.
Vickers, Andrew J, and Elena B Elkin. 2006. “Decision Curve Analysis: A Novel Method for Evaluating Prediction Models.” Medical Decision Making 26 (6): 565–74. https://doi.org/10.1177/0272989X06295361.
Wickrama, Kandauda AS, Tae Kyoung Lee, Catherine Walker O’Neal, and Frederick O Lorenz. 2016. Higher-Order Growth Curves and Mixture Modeling with Mplus: A Practical Guide. Routledge. https://doi.org/10.4324/9781315642741.
World Health Organization. 2024. “Maternal Mortality: Key Facts.” WHO Fact Sheets. https://www.who.int/news-room/fact-sheets/detail/maternal-mortality.