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Hire Raymond M.

Kiribati

USD 70 /hr

Biostatistician & Data Scientist | PhD | Expert in R, SAS, Python, Survey Analysis & ML

Profile Summary

I am a highly experienced Biostatistician, Data Scientist, and Statistical Analyst with over 20 years of professional experience in public health research, epidemiology, clinical data analysis, artificial intelligence, and advanced statistical modeling. I hold a PhD in Biostatistics and a Bachelor of Science in Mathematics with First Class Honors. Over the years, I have worked with leading research and public health institutions, including Centers for Disease Control and Prevention, where I have supported large-scale health programs through data analysis, surveillance systems, monitoring and evaluation, and operational research. In addition to my public health and research background, I also work with Micro1 as a Statistics and AI Training Expert, where I contribute to AI model evaluation, data annotation, prompt engineering, technical assessments, and training workflows involving statistical reasoning, machine learning, and analytical problem-solving. This experience has strengthened my expertise in artificial intelligence applications, model evaluation, data quality assessment, and human-in-the-loop AI systems. My expertise includes statistical analysis, machine learning, predictive modeling, epidemiological research, survey data analysis, clinical research analytics, dashboard development, and data visualization. I am highly proficient in R, SAS, Python, SQL, Excel, Power BI, Tableau, and GIS-based analytical tools. I have extensive experience handling complex datasets, including longitudinal data, health surveillance data, environmental datasets, and national survey data. I have led and contributed to numerous research and analytical projects involving HIV/AIDS, tuberculosis, environmental health, air pollution, hospital performance indicators, migration and refugee health, and health management information systems. My recent work includes developing predictive models for mortality risk among people living with HIV, analyzing environmental pollution impacts on health outcomes using Generalized Additive Models (GAMs) and Negative Binomial models, and designing interactive dashboards and geospatial visualizations for decision support. My research and analytical experience includes: Survival analysis using Kaplan-Meier curves and Cox proportional hazards models Longitudinal and time series analysis Machine learning and predictive analytics Generalized Linear Models (GLM), GAMs, and mixed models Complex survey analysis using weighted and stratified designs Statistical programming and automation in R and SAS Data cleaning, preprocessing, feature engineering, and model validation AI model evaluation and statistical reasoning assessments Interactive dashboards and reporting systems Health systems strengthening and monitoring & evaluation I also have experience in academic and technical writing, including manuscript preparation, statistical reporting, protocol development, proposal writing, and preparation of publication-quality tables, figures, and reports. I am passionate about transforming complex data into actionable insights that support evidence-based decision-making, AI innovation, and policy development. I am available for projects involving statistical analysis, biostatistics, machine learning, AI training and evaluation, epidemiology, survey analysis, dashboard creation, research consultation, data visualization, and scientific writing.

Subject Matter Expertise

• ★ Biostatistics
• ☆ Statistics
• ☆ SAS
• ☆ R

Services

• Data & AI

Data & AI Predictive Modeling, Statistical Analysis, Image Processing, Image Analysis, Algorithm Design-Non ML, Algorithm Design-ML, Data Visualization, Big Data Analytics

Work Experience

Statistican

Micro1

August 2025 - Present

Statistician

CDC

February 2010 - May 2025

Statistican

CDC/KEMRI

February 2007 - January 2010

Dataanalyst

NARESA

January 2005 - January 2007

Education

PhD (Biostatistics)

University of KwaZulu-Natal - Pietermaritzburg Campus

August 2012 - March 2019

Masters of Science - Biometry

University of Nairobi

August 2002 - August 2004

Mathematics

Catholic University of Eastern Africa - Kenya

August 1997 - August 2001

Certifications

• Certification details not provided.

Publications

PREPRINT

Mohamed AH, Musyoka RN, Dalal W, Burke H, Ahmed J, Eidex R(2020). Use of maternal and child health services in a community with large refugee population in Nairobi, Kenya: a cross-sectional survey .

JOURNAL ARTICLE

Nyoka R, Achia TNO, Omony J, Musili SM, Gichangi A, Mwambi H(2019). Time series non-Gaussian Bayesian bivariate model applied to data on HMPV and RSV: a case of Dadaab in Kenya . BMC public health.

Golicha Q, Shetty S, Nasiblov O, Hussein A, Wainaina E, Obonyo M, Macharia D, Musyoka RN, Abdille H, Ope M, et al.(2018). Cholera Outbreak in Dadaab Refugee Camp, Kenya - November 2015-June 2016 . MMWR. Morbidity and mortality weekly report.

Nyoka R, Foote AM, Woods E, Lokey H, O'Reilly CE, Magumba F, Okello P, Mintz ED, Marano N, Morris JF(2017). Correction: Sanitation practices and perceptions in Kakuma refugee camp, Kenya: Comparing the status quo with a novel service-based approach . PloS one.

Nyoka R, Foote AM, Woods E, Lokey H, O'Reilly CE, Magumba F, Okello P, Mintz ED, Marano N, Morris JF(2017). Sanitation practices and perceptions in Kakuma refugee camp, Kenya: Comparing the status quo with a novel service-based approach . PloS one.

Nyoka R, Omony J, Mwalili SM, Achia TNO, Gichangi A, Mwambi H(2017). Effect of climate on incidence of respiratory syncytial virus infections in a refugee camp in Kenya: A non-Gaussian time-series analysis . PloS one.

Evaluation of the Field Performance of ImmunoCard STAT!^® Rapid Diagnostic Test for Rotavirus in Dadaab Refugee Camp and at the Kenya-Somalia Border. @article{PMID:28719278, title = {Evaluation of the Field Performance of ImmunoCard STAT!^® Rapid Diagnostic Test for Rotavirus in Dadaab Refugee Camp and at the Kenya-Somalia Border.}, author = {Ope M and Nyoka R and Unshur A and Oyier FO and Mowlid SA and Owino B and Ochieng SB and Okello CI and Montgomery JM and Wagacha B and Galev A and Abdow A and Esona MD and Tate J and Marano N}, doi = {10.4269/ajtmh.16-0885}, journal = {The American journal of tropical medicine and hygiene}, month = {06}, year = {2017} } . The American journal of tropical medicine and hygiene.

Goers M, Ope MO, Samuels A, Gitu N, Akandwanaho S, Nabwami G, Nyoka R, Cetron MS, Dalal W, Conroy AL, et al.(2016). Notes from the Field: Splenomegaly of Unknown Etiology in Congolese Refugees Applying for Resettlement to the United States - Uganda, 2015 . MMWR. Morbidity and mortality weekly report.

Omballa VO, Musyoka RN, Vittor AY, Wamburu KB, Wachira CM, Waiboci LW, Abudo MU, Juma BW, Kim AA, Montgomery JM, et al.(2015). Serologic Evidence of the Geographic Distribution of Bacterial Zoonotic Agents in Kenya, 2007 . The American journal of tropical medicine and hygiene.

Ochieng C, Ahenda P, Vittor AY, Nyoka R, Gikunju S, Wachira C, Waiboci L, Umuro M, Kim AA, Nderitu L, et al.(2015). Seroprevalence of Infections with Dengue, Rift Valley Fever and Chikungunya Viruses in Kenya, 2007 . PloS one.

Ngugi EW, Kim AA, Nyoka R, Ng'ang'a L, Mukui I, Ng'eno B, Rutherford GW, KAIS Study Group(2014). Contraceptive practices and fertility desires among HIV-infected and uninfected women in Kenya: results from a nationally representative study . Journal of acquired immune deficiency syndromes (1999).

Mohamed AH, Dalal W, Nyoka R, Burke H, Ahmed J, Auko E, Shihaji W, Ndege I, Breiman RF, Eidex RB(2014). Health care utilization for acute illnesses in an urban setting with a refugee population in Nairobi, Kenya: a cross-sectional survey . BMC health services research.

Agoti CN, Mayieka LM, Otieno JR, Ahmed JA, Fields BS, Waiboci LW, Nyoka R, Eidex RB, Marano N, Burton W, et al.(2014). Examining strain diversity and phylogeography in relation to an unusual epidemic pattern of respiratory syncytial virus (RSV) in a long-term refugee camp in Kenya . BMC infectious diseases.

Cherutich P, Kaiser R, Galbraith J, Williamson J, Shiraishi RW, Ngare C, Mermin J, Marum E, Bunnell R, KAIS Study Group(2012). Lack of knowledge of HIV status a major barrier to HIV prevention, care and treatment efforts in Kenya: results from a nationally representative study . PloS one.

Mahamud AS, Ahmed JA, Nyoka R, Auko E, Kahi V, Ndirangu J, Nguhi M, Burton JW, Muhindo BZ, Breiman RF, et al.(2012). Epidemic cholera in Kakuma Refugee Camp, Kenya, 2009: the importance of sanitation and soap . Journal of infection in developing countries.

Kim C, Nyoka R, Ahmed JA, Winchell JM, Mitchell SL, Kariuki Njenga M, Auko E, Burton W, Breiman RF, Eidex RB(2012). Epidemiology of respiratory infections caused by atypical bacteria in two Kenyan refugee camps . Journal of immigrant and minority health.

Ahmed JA, Katz MA, Auko E, Njenga MK, Weinberg M, Kapella BK, Burke H, Nyoka R, Gichangi A, Waiboci LW, et al.(2012). Epidemiology of respiratory viral infections in two long-term refugee camps in Kenya, 2007-2010 . BMC infectious diseases.

Mwangi M, Bunnell R, Nyoka R, Gichangi A, Makokha E, Kim A, Kichamu G, Marum L, Ichwara J, Mermin J, et al.(2011). Unsafe sex among HIV-infected adults in Kenya: results of a nationally representative survey . Journal of acquired immune deficiency syndromes (1999).

Kim C, Ahmed JA, Eidex RB, Nyoka R, Waiboci LW, Erdman D, Tepo A, Mahamud AS, Kabura W, Nguhi M, et al.(2011). Comparison of nasopharyngeal and oropharyngeal swabs for the diagnosis of eight respiratory viruses by real-time reverse transcription-PCR assays . PloS one.

Kaiser R, Bunnell R, Hightower A, Kim AA, Cherutich P, Mwangi M, Oluoch T, Dadabhai S, Mureithi P, Mugo N, et al.(2011). Factors associated with HIV infection in married or cohabitating couples in Kenya: results from a nationally representative study . PloS one.

Basavaraju SV, Mwangi J, Kellogg TA, Odawo L, Marum LH, 2007 Kenya AIDS Indicator Survey Group(2010). Quantification of print, radio and television exposure among previous blood donors in Kenya: an opportunity for encouraging repeat donation in a resource-limited setting? . Vox sanguinis.

Kimani D, Mwangi J, Mwangi M, Bunnell R, Kellogg TA, Oluoch T, Gichangi A, Kaiser R, Mugo N, Odongo T, et al.(2010). Blood donors in Kenya: a comparison of voluntary and family replacement donors based on a population-based survey . Vox sanguinis.