My research studies focus on the watershed processes and anthropogenic impacts in inland lakes; metal contamination and eutrophication in Lakes Victoria, Naivasha and Baringo ecosystems. Specific research studies conducted, involved the understanding of metal sources, distribution, accumulation in the sediments and biota, and related ecological and health risks. I was also involved in multidisciplinary research studies on inventorisation and understanding of the status and changes in the aquatic biodiversity of Lake Victoria (Kenya) and its satellite lakes, under the LEVMP-phase I project (Lake Victoria Environment management Project (LVEMP)-Fisheries Research Component - Fish Biology and Biodiversity Conservation Subcomponent -Study project,2000-2004). During LVEMP phase II, I was involved in monitoring of water pollution in fishing grounds of Lake Victoria, (Kenya), with the aim of protecting the fish nursery and breeding grounds. Besides the annual KMFRI Kisumu Performance contract target activities, I also contributed to an interdisciplinary research project on Aquaculture:- Pathway to food security in Kenya. (University of Eldoret (UOE); KMFRI, University of Nottingham-UK, and British Geological Survey (BGS-UK) Research team in Lake Victoria. 

Research interests includes, trace metals & organic contaminants pollution in aquatic ecosystems, nutrients (eutrophication) in  inland water bodies, biomonitors, wastewater technologies and solid waste management, ecotoxicology and bioassessments, toxicants risk assessments; sedimentary environments, sedimentation processes and biogeochemical cycles. Use of GIS techniques in natural resources planning and management, and environmental impact assessments (EIA) in sustainable environmental management.

Keywords: Watersheds; Biogeochemical; Sedimentary environment; Limnology; Monitoring and assessments of pollution and water quality; Organic matter; Indicators; Trace elements; Nutrients; Climate change; GIS mapping; Environmental impacts; Ecosystem restoration and remediation.

• Mapping and monitoring major point sources of pollution and assess their effect on fish ecology in Lake Victoria
• Monitoring pollution in 4 biodiversity hotspots in Lake Victoria (Nyando, Awach, Nzoia, Yala, Kuja, and Sondu – Miriu river mouths) for informed management decisions.
• Monitoring and mapping of water hyacinth and other floating macrophytes in Lake Victoria for improved water hyacinth surveillance to inform resource users.
• Consultancy Water Quality Sampling and Analyses for Dunga WTPs’ Design in Kisumu, Kenya. (Consultancy on Water Resources and Wastewater Masterplan in Kisumu County under LVWATSAN Program)
• Scientific Research expedition in Lakes Chala and Jipe Taita Taveta County. Monitoring and mapping of water hyacinth and other floating macrophytes in Lake Victoria for improved water hyacinth surveillance to inform resource users.
• Aquaculture, safe and nutritious source of protein and healthy Lake Victoria communities free from hunger and poverty (GCRF Interdisciplinary Research Project) Collaborative project with University of Eldoret (UOE); KMFRI, University of Nottingham-UK, and British Geological Survey (BGS)-UK.
• Lake Victoria Environmental Management Project (LVEMP)-Phase - II (2010-2013):-Project activity: monitoring of pollution in fishing grounds: Trace metals.
• Lake Baringo Research Project (LABRE) (2007-2009) on Assessment of the fisheries, water quality and socio-economics of Lake Baringo: Study: Trace metals in Lake Baringo Ecosystem.
• Lake Victoria Environmental Management Project (LVEMP Phase I) (2000-2004) Project: Fisheries research: Fish biology and biodiversity conservation component.
• Study: Investigation on the main environmental factors influencing biodiversity in Lake Victoria and satellite lakes: Trace metals

• Lake Naivasha Research Project (LNRP) (2001-2002; 2007) Project: Assessment of the current status of fisheries and water quality of Lake Naivasha: Study: Assessment of the chemical pollutants in sediments water, fish and aquatic macrophytes in lake Naivasha: Inorganic pollutants.
• Kenya Belgium Joint Project in Freshwater Ecology (1994 – 1996): Project: Study of some inorganic contaminants in the water, sediments, fish and benthic organisms of Lake Victoria (Kenya) and major rivers.

• Links: www.researchgate.net; www.Publons.com;
• ORCID ID: http://orcid.org/000-0003-3036-5089;