MULTIDISCIPLINARY TEAMS
We are engineers, economists, institutional experts and urban planners who work hand-in-hand to provide access to essential services and improved living environments for local residents.
WHO ACCOMPANY YOU THROUGHOUT THE PROJECT CYCLE
We will support you in all social and technical engineering activities, assessments, studies and master plans, project management, technical assistance, evaluation and knowledge management.
WITH A HIGH LEVEL OF EXPERTISE
Our employees have extensive field experience, and have the methodological and operational support of Global Development at their disposal for all of our key themes.
TEAM BASED IN LATIN AMERICA
Darío
CARRERA
Civil engineer, specialist in water and sanitation
21 years of professional experience
Darío has experience in the evaluation, development and execution of infrastructure projects, specifically in the drinking water and sanitation sector in Latin America.
Working in various positions in project evaluation, hydraulic design, construction supervision and project management in Colombia, Ecuador, Guatemala, Uruguay and Venezuela, Darío has focused his experience on development and humanitarian programmes.
Recognising the relationship between drinking water and sanitation projects and social growth in Latin American countries, Darío has sought opportunities to apply his technical knowledge to projects with a significant social impact, beyond the economic. He joined Nexsom’s team of experts in 2025
Diana Carolina
CÓRDOBA VELANDIA
Environmental Engineer and Water Resources and Environmental Management Specialist
12 years of professional experience
Diana is a water and sanitation professional with more than 12 years of international experience in optimising and operating water treatment plants, diagnosing, supporting and monitoring water, sewerage and sanitation service providers, developing sector reports, technical studies on water and sewerage systems, environmental impact studies and project evaluations.
Diana has worked with public and private entities in the analysis of sectoral information and in the development of plans and projects with an inter-institutional focus in the water and sanitation sector. She has also supervised the technical operations of water and sewerage service companies in urban and rural areas, carrying out diagnostics, monitoring and suggestions for improvement in areas such as: infrastructure status and operation, network registries and water quality. Similarly, she has provided training on various topics for water, sewerage and sanitation service providers. During her professional career, she has had the opportunity to coordinate interdisciplinary groups of professionals for the structuring and development of environmental impact studies, environmental management plans and pre-feasibility studies, applying both national and international regulations.
Marie
MOREL
Economist, Specialist in the analysis and evaluation of Development Projects
8 years of professional experience
A graduate of the Centre d’Etudes et de Recherche sur le Développement International, Marie specialises in development economics and project analysis. She has thus developed solid skills in management tools and research methodologies applied to development economics issues. In Colombia, Marie became involved with an NGO and quickly familiarised herself with the Latin American context. She joined Hydroconseil in 2019, where she applies her socio-economic, institutional and statistical expertise to projects aimed at improving access to drinking water and sanitation services.
She specialises in the evaluation of development projects and programmes, especially in the water, and sanitation sector. She conducts evaluations for NGOs as well as for bilateral and multilateral agencies such as UNESCO, UNICEF, AFD and the IDB. Her strong command of evaluation approaches, methodologies and tools enables her to adapt them to a wide range of sectors and contexts. Since 2019, she has carried out more than a dozen evaluations across different countries and thematic areas.
Since July 2021, Marie has been based in Colombia, where she has been supporting AFD as a technical assistant for a complex, multi-country regional programme in Latin America and the Caribbean (Euroclima), overseeing the monitoring and evaluation of six sectoral projects. She has also led two major evaluations for the IDB in Peru and Uruguay, and is actively involved in the joint external mid-term evaluation of the UN-Water Strategy 2030 and Phase 3 of the Integrated Monitoring Initiative for SDG 6 (IMI-SDG6).
Geraldine
VANEGAS LÓPEZ
Engineer, environmental and sanitation specialist
5 years of professional experience
Sanitary Engineer and M.Sc. in Environmental Engineering, specialized in environmental impact assessment and environmental management of drinking water, sanitation and integrated solid waste management projects. She has experience in the preparation of Environmental Impact Assessments (EIA and ESIA), Environmental and Social Management Plans (ESMP/PGAS) and environmental technical reports supporting decision-making for projects subject to environmental licensing and multilateral development bank standards, including projects financed by the AFD and the IDB, and implemented under frameworks aligned with the World Bank, as well as projects regulated by ANLA in Colombia.
Her work has focused on the assessment of environmental quality, including surface and groundwater, air quality and noise, through field monitoring, laboratory data interpretation and technical analysis, contributing to the development of environmental baselines, impact identification and evaluation, and regulatory compliance verification. She has participated in environmental and social assessments, contributing to the formulation of management, mitigation and environmental monitoring programs.
She also has experience in integrated solid waste management, including waste characterization, diagnosis of collection and treatment systems, and the development of recycling and waste valorization components. Her work includes field data collection, waste flow analysis, route optimization and support to material recovery strategies, in both municipal and industrial contexts.
HEAD OFFICE TEAM
Bruno
VALFREY
Institutional / WASH / IWRM / private sector participation / evaluation / action research / knowledge products development expert
34 years of professional experience
Bruno Valfrey holds an engineering degree and an MPhil in science. He has been a consultant with the Hydroconseil team since 1995. He primarily specialises in basic public services – drinking water, sanitation and hygiene, and solid waste. He has also worked on integrated water resources management, irrigation, energy and climate change adaptation issues. Bruno has carried out numerous studies in the water sector in the broadest sense of the term: technical studies, institutional and socio-economic feasibility, M&E, case studies, action research, workshop facilitation, management model development, cross-sector studies, and lesson-learning.
He also studied and monitored the construction of water supply and sanitation facilities in some 20 African and Latin American countries. In addition to his technical expertise, he is a recognized water and sanitation sector, institutional, and economic specialist. He has been involved in public policy development in more than a dozen countries and he formulated and evaluated more than 100 projects and programmes in 40+ countries (most often as team leader). He regularly leads consultation workshops with water and sanitation sector stakeholders and contributes to sector monitoring by helping to draft national and international reports. He is also a lecturer and trainer, and has published some thirty articles and books.
Since 2010, he has been the manager of Hydroconseil, of which he is currently the chairman. He also coordinates all innovation and R&D activities for Global Development.
François
TOUCHAIS
Institutional Expert
24 years of professional experience
François Touchais is a governance and institutional reform expert specializing in the water and environmental sectors. Over more than 24 years, he has supported governments, utilities, and international organizations in improving the management of water resources, drinking water supply, and sanitation services. Renowned for his strategic vision and ability to coordinate complex, multi-stakeholder initiatives, he has led or advised on large-scale programs with multimillion-euro budgets aimed at strengthening sector performance and regulatory frameworks.
François Touchais is an expert in institutional governance, policy, and regulatory development, with a focus on the structuring and modernization of drinking water, sanitation, and irrigation utilities. He has extensive experience in integrated water resources management, transboundary basin governance, and resilience to floods and droughts. Combining analytical depth with a pragmatic understanding of institutional dynamics, François brings a cross-cutting perspective that bridges policy, legal, and operational dimensions. He regularly contributes to institutional diagnostics, policy design, technical assistance, and capacity-building programs supporting the modernization of water governance systems at both national and international levels.
Since 2022, François has been working with Hydroconseil, as Senior Institutional and Legal Expert and Team Leader. He leads governance and reform assignments for governments and development partners. Earlier in his career, he served with the Commissariat for Atomic Energy and Alternative Energies (CEA), the International Office for Water (OiEau), and the Austrian Environment Agency (Umweltbundesamt – UBA GmbH). He has also advised numerous international organizations, including the United Nations Development Programme (UNDP), the United Nations Children’s Fund (UNICEF), the United Nations Economic Commission for Europe (UNECE), and the German Agency for International Cooperation (GIZ – Deutsche Gesellschaft für Internationale Zusammenarbeit).
François currently serves as Vice President of the International Association for Water Law (AIDA), contributing to the advancement of water governance and legal frameworks worldwide.
Stephanie
MAY
Civil Engineer, Water and Sanitation Specialist
11 years of professional experience
Stephanie’s experience in delivering infrastructure projects, particularly water infrastructure, covers all stages of the project cycle, from design to construction and programme management, in Europe, Africa, the Middle East and South-East Asia.
Following a number of roles in structural and hydraulic design, works supervision and project management in France, Stephanie decided to put her expertise towards the service of development and humanitarian programmes. As Country Manager of an INGO in Rwanda, she coordinated a programme to build rural pedestrian bridges, ensuring dialogue and consultation with the national authorities, and managing a team of 16 engineers and technicians to undertake the works. As an Urban Water Project Manager with the ICRC, she has mobilised and supported local authorities for the construction and rehabilitation of drinking water infrastructure in post-conflict contexts. In Juba in South Sudan, she supervised the implementation of a water supply system (target population 200,000 by 2045) and establishment of an operator. In Mosul in Iraq, she oversaw a team managing up to ten projects as part of a multi-year programme to improve access to the water supply service and support the authorities to regain control of the system, thus initiating the transition from an emergency to normal mode of operation.
Stephanie’s commitment to the community is reflected in a number of volunteer assignments: design of a water tower in Madagascar, training, awareness raising and infrastructure and resource assessment for drinking water and sanitation in 10 rural villages in Côte d’Ivoire, and strengthening capacity in the WASH sector in Cambodia. These experiences have made Stephanie a project manager who is attentive to the needs of a wide range of stakeholders, capable of understanding projects in their entirety and proposing solutions based in the realities on the grounds. She joined Hydroconseil’s team of experts in 2025.
Ignacio
MAGNANI
Water Resources Specialist / Water Supply and Sanitation Engineer
10 years of professional experience
A civil engineer and water resources specialist with 10 years of international experience, he has worked on diagnostic, prefeasibility, and feasibility studies for development cooperation projects. Trained at the University of Buenos Aires and holder of the Erasmus Mundus EuroAquae MSc in Hydroinformatics and Water Management (Spain, the United Kingdom, Germany, Poland, and France), he combines scientific rigor with a holistic understanding of the water cycle.
Before moving into international development, he worked in Argentina as a water and sanitation engineer, designing water supply, sanitation, and stormwater systems for secondary cities.
His expertise spans hydrology, hydrogeology, and integrated water resources management (IWRM). He has led hydrological and hydraulic modelling studies for flood and drought risk management, incorporating climate change impacts through emission scenarios and downscaling techniques. Notably, he has conducted multi-risk assessments for drinking water supply systems in Burundi and Peru, as well as a territorial water assessment across four governorates in Jordan.
Specialized in nature-based solutions, he identifies and designs investments to strengthen climate resilience—reforestation, terracing, urban green infrastructure (SuDS), and retention basins—using participatory planning and cost-benefit analyses that account for ecological and social co-benefits. His training in the United Kingdom on SuDS further enhances his operational approach to climate adaptation.
Before joining international development projects, he worked in Argentina as a water and sanitation engineer, contributing to the design of water supply, sanitation, and stormwater drainage systems for secondary cities.
A multidisciplinary professional, he stands out for his ability to lead multicultural teams and coordinate complex studies. He leverages these skills to develop integrated solutions to water-related challenges—floods, droughts, and environmental degradation—across diverse contexts, from Latin America to sub-Saharan Africa.
Laure-Elise
MAYARD
Legal expert on water rights
10 years of professional experience
As a legal expert specialising in water resource, sanitation and water supply management, service governance and people’s rights to access these services, Laure-Elise has been involved in case studies in countries such as South Africa, Bangladesh and South Korea. Awarded a Young Water Leader prize during her Master’s studies, she continued her research by focusing on the national and cross-border issues raised by the Mekong River dams. Working in both basin organisation countries (Thailand, Laos, Cambodia, Vietnam) and neighbouring countries (China, Myanmar), she used an inter-connected approach to examine the issues posed by these dams and explore their environmental, social and economic impacts on governance, national and international law and resource management. She particularly focused on the social impacts and studied the resettlement provisions put in place for affected communities, as well as the institutional and legal measures available to help affected communities advocate for their water rights the event of cross-border issues. A strong believer in sustainable development, Laure-Elise advocated for compromise when responding to the economic, social and environmental problems associated with these major dam investment programmes.
Laure-Elise has published a number of academic papers and spoke at the 17th World Water Congress, highlighting the issues created by dams, both in Asia and Africa, while recommending tangible adjustments to sustainable development and hydropower policy.
Having built up extensive experience of raising awareness and lobbying on domestic water use, she joined the Water For Life and Peace department of the NGO Greencross International, where she helped formulate a project to improve management of the Jordan river basin. Laure-Elise ensured that the project took an inclusive and eco-systemic approach to river basin management, which included all its stakeholders, issues and governance levels. As a member of AIDA, she occasionally represents the association at UNESCO’s Intergovernmental Hydrological Programme. In 2025, Laure-Elise joined Hydroconseil, where she is providing support to our Global Development Group clients using her skills in comparative analysis and adaptation to improve water resource institutional set-ups and governance.
Antoine
GUERRY-GRIVAUD
Water and Sanitation Expert
8 years of professional experience
Antoine Guerry–Grivaud is a water and sanitation engineer. He trained at the engineering school of “Polytechnique Universitaire de Montpellier” in water science and technology. This training enabled him to acquire solid skills in the analysis of surface and groundwater resources, the production and distribution of drinking water, and the management of wastewater and stormwater.
Joining Global Development team in 2021, he has seven years’ experience as a project manager in a design office. His experience has enabled him to work on environmental studies to organize regional planning and the management of associated risks (particularly flood management), as well as on the management of aquatic environments. He has also planned and implemented environmental quality monitoring protocols.
At Hydroconseil, Antoine has provided his expertise for hydraulic, hydrological, urban planning and socio-economic assessments for drinking water supply and sanitation master plans or feasibility studies. He has also set up performance monitoring systems to support and strengthen water services.
As a multi-disciplinary engineer, he is regularly involved in the field, both as a project coordinator and as a specialized technician. Thanks to his good knowledge of geomatics, he has contributed to the development of GIS mapping tools. His assignments have been carried out for public and private operators, notably in Togo, DRC, Vietnam and La Réunion.
Lise-Ella
LLANSO
Socio-economist, specialized in integrated Solid Waste Management (ISWM), water and sanitation
7 years of professional experience
With a dual Master’s degree in Urban Services Engineering and Human and Social Sciences, Lise-Ella specializes in improving access to essential services in ‘developing’ countries. She joined Hydroconseil in 2019 to contribute to water, sanitation, and waste projects. Since 2022, she has also been our solid waste specialist.
Within our Global Development group, Lise-Ella manages international projects with varying budgets and is particularly involved in institutional, organizational and socio-economic aspects. Her expertise in participatory social engineering methods enables her to work with a variety of audiences (institutions, small operators, communities, informal sector, etc.) to develop concerted studies and recommendations, thereby ensuring the realism and viability of the proposed solutions. In addition, she promotes an inclusive and resilient development approach in each of the projects she is involved in.
She has drawn on her knowledge of public policy to carry out institutional and organizational assessments for central and local government institutions, as well as the private sector (ministries, cities, operators, etc.). Lise-Ella fosters an inclusive and resilient development approach in all the projects in which she is involved.
Her career has led her to specialize in the solid waste sector. She has conducted several waste characterization studies (Latin America, Caribbean, West Africa), participated in studies aimed at strengthening pre-collection services in urban areas (Central Africa, West Africa), and promoted integrated waste management, particularly for the most vulnerable groups such as waste pickers (Latin America). She has also participated in the development of international best practice guides on waste prevention, management, and recovery, placing gender issues at the heart of the approach (Maghreb).
Lola
BONILLA
Economist, specialising in water and sanitation projects
4 years of professional experience
With a double Master’s degree in economics and urban network services engineering, Lola is an economist specialising in essential services, particularly in the water and sanitation sectors. Her profile is based on two complementary areas of expertise.
The first part of her career has focused on applied economics and market analysis, including the design of quantitative and qualitative survey tools, sampling, fieldwork, and statistical and socio-economic analysis (willingness and ability to pay, demand analysis, user studies). She regularly works in the field, particularly in Central Africa.
The second part of her experience focused on financial and strategic analysis of water and sanitation operators and services: financial modelling, cost-benefit analysis, pricing, budgeting, service profitability analysis and strategic decision-making support. She assists public operators and local authorities in structuring commercial strategies, defining KPIs and developing roadmaps.
Lola works as a socio-economist and financial economist for public organisations and international donors (World Bank, EIB, AFD), combining technical, financial and social analyses that are closely aligned with the realities on the ground.
Garance
BERGER
Economist Expert
3 years of professional experience
With a master’s degree in development economics from the Centre for International Development Studies and Research (CERDI), Garance specialises in project analysis and management in official development assistance. She has a solid grasp of economic analytical frameworks and quantitative methods applied to public policy and essential services, particularly in the water, sanitation and hygiene sectors. Her career has enabled her to develop comprehensive expertise in the socio-economic analysis production chain, from survey design to results interpretation.
Garance has been with Hydroconseil for over three years, applying her economic and data expertise to numerous international projects. She designs and manages large-scale socio-economic surveys (KoboToolBox, Sphinx, mWater), performs statistical analyses using Excel and SPSS, develops indicators and decision-making dashboards (Power BI), and promotes the results to aid decision-making. She has been involved in the baseline study for the UNOPS Emergency Support for Reducing Waterborne Diseases in Freetown (2024–2025) project, funded by the Japanese government, as well as establishing a WASH baseline for UNICEF in 15 schools in the state of Nuevo León in Mexico, overseeing the entire data process from collection to analysis and operational reporting of results. She is also contributing to the joint mid-term evaluation of the UN-Water 2030 Strategy and the Integrated Monitoring Initiative for SDG 6 (IMI-SDG 6) as an expert in data collection and analysis, performance indicators and the formulation of strategic recommendations.
Sebastián
PRUDENCIO
Water and sanitation Expert
2 years of professional experience
Thanks to his expertise in water management, treatment and governance, as well as in the solid and liquid sanitation and environmental sectors, Sebastián is contributing, between 2020 and 2021, to the study of a transboundary basin between Peru and Bolivia and to the analysis of a local community’s water supply system. The issues he addresses relate to drinking water supply, water governance and hydrology. He is also contributing to research work in Sweden, analysing the influence of riparian zones on river dynamics. Sebastian is also conducting a study on a plant-based water disinfection system and is expanding his expertise in exploring nature-based solutions while ensuring that he evaluates the treatment efficiency and reuse potential (REUT) of wastewater from these systems. In 2024, he joined the Hydroconseil team as a water and sanitation engineer. Responsive and multidisciplinary, he is involved in several projects and is participating in the implementation of four pilot DMAs in Mosul to limit Non-Revenue Water (NRW) in the city’s drinking water networks. Sebastian also contributed to the development of Libya’s national water strategy and the assessment of water resources in four governorates in Jordan. He applied his engineering skills to the design study of sanitation products incorporating a Human-Centred Design (HCD) process for sanitation products for four regions in the DRC.
