Civil & Environmental Engineer — Water · Sanitation · Nutrient Recovery
Denis Sigei Ruto
Engineering water & sanitation for the underserved — from Nairobi's informal settlements to rural Appalachia. PhD, West Virginia University.
Open to roles · Fall 2026
8+
Years in WASH
210,000
People served
100 t/day
Waste → resource
2M+
Handwashes
4
Countries
Selected projectsAll projects →
01
Sanergy — circular sanitation
100 t/day of organic waste into fertilizer, insect feed, and energy; sanitation for 5,000+ households.
2016–18
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02
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AccessWASH — utility intelligence
Founded digital tools for water-utility operations serving 210,000; adopted by Rotary clubs worldwide.
2018–22
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03
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Lagoon Mapping
GIS + deep learning and remote sensing to map lagoon wastewater systems serving 10,000+ small U.S. communities.
2023–26
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PublicationsAll publications →
P1
Ruto, D., Jang, Z., Leverenz, H., Cornejo, P., Orner, K. — Toward Sustainable Lagoon Wastewater Treatment: A Review of Nutrient Management Technologies and Their Suitability for Small Communities
ACS EST Water 5(11), 6200–6216 · 2025 · 12 citations
P2
Ruto, D., Jang, Z., Leverenz, H., Cornejo, P., Orner, K. — State of nutrient management infrastructure of lagoon wastewater systems serving small communities in the U.S.
Environ. Res.: Water 2, 025007 · 2025
P3
Ruto, D., Corbin, V., Jang, Z., Leverenz, H., Mehl, S., Cornejo, P., Orner, K. — Selecting Nutrient Management Strategies for Small Community Lagoon Systems: A Multi-Criteria Framework
Environ. Res.: Water · 2026
PerspectivesAll writing →
01
What rural America can learn from Nairobi's water utilities
Jul 2026 · 6 min
Where I work
Nairobi
Kenya
Delft
Netherlands
Monteverde
Uruguay
Morgantown
USA