What Does a WASH Engineer Do in International Development?

What Does a WASH Engineer Do in International Development?

WASH — Water, Sanitation, and Hygiene — is one of the most foundational areas of international development and humanitarian response. WASH engineers design and oversee the systems that deliver safe drinking water, build latrines and sewage facilities, and promote hygiene practices that prevent disease. The role is both technically demanding and deeply field-oriented, combining civil engineering skills with community engagement and project management.

Core Responsibilities

A WASH engineer's day-to-day work depends heavily on the context — emergency response, recovery, or long-term development. Common responsibilities include:

Technical design and oversight

• Designing water supply systems: boreholes, hand pumps, gravity-fed systems, chlorination units, water trucking logistics
• Designing sanitation facilities: latrines (including family, communal, and institutional), sewage systems, faecal sludge management
• Conducting hydrological assessments and water quality testing
• Overseeing construction by local contractors and ensuring quality control

Programme management

• Preparing bills of quantities, technical specifications, and tender documents for procurement
• Managing budgets and spending forecasts for WASH components
• Coordinating with local government authorities, community leaders, and other cluster partners
• Reporting to donors (USAID, ECHO, FCDO) on programme progress and expenditure

Community engagement

• Working with hygiene promotion teams to ensure communities understand and maintain WASH infrastructure
• Training local technicians and community water committees to operate and repair systems independently

Who Hires WASH Engineers?

The largest employers of WASH engineers in the development sector include:

• UN agencies: UNICEF (which leads the global WASH cluster), UNHCR (for refugee camp infrastructure), WHO
• International NGOs: Oxfam, IRC, Mercy Corps, ACF, Solidarités International, CARE, Save the Children
• Engineering and consulting firms: Arup, GHD, WSP, Tetra Tech — often delivering USAID or World Bank-funded infrastructure projects
• National governments and utilities: particularly in countries receiving development bank support for urban water systems

Qualifications and Experience

Most WASH engineer roles require:

• A bachelor's or master's degree in civil, environmental, or water resources engineering (or a related field)
• Field experience in low-resource settings — this is almost always a prerequisite for international roles
• Knowledge of sphere standards and WASH cluster coordination mechanisms
• Familiarity with water quality testing and basic hydrogeology

Entry-level roles (one to three years' experience) are often available with larger INGOs working in humanitarian response. Senior and coordinator-level roles typically require five or more years of relevant field experience.

Salary Range

WASH engineer salaries in the sector vary widely:

• Entry-level NGO roles: $30,000–$50,000 per year, often with accommodation and per diem included
• Mid-level INGO or UN: $60,000–$90,000 equivalent (UN P3)
• Senior or HQ-based: $90,000–$130,000+, particularly with UN agencies or large consulting firms

Find WASH Engineering Jobs on DevProcure

WASH roles are posted across multiple sources that DevProcure aggregates daily — including UNICEF, UNHCR, ReliefWeb, NGO direct postings, and implementing-partner firms. Set up a free WASH alert to receive matching vacancies by email.