Design
Roadway, drainage, bridge, civil site, and related infrastructure design from concept through tender documentation.
View serviceConsulting Engineers - Sierra Leone
Edward Davies & Associates Ltd.
Engineering design, supervision, surveying, geotechnical, and consulting support for infrastructure that must work in real places, under real conditions.
Established practice
Six decades of local infrastructure experience.
Since 1963, EDA has provided engineering consultancy services for roads, bridges, drainage, water infrastructure, geotechnical works, and community-linked urban improvement projects.
1963Practice established by Edward J. Davies
1978Samuel Leigh succeeded as CEO after joining in 1975
2025Engineer Sam Leigh retired after 47 years of leadership
Core Services
Practical engineering support from concept to construction.
Supervision
Construction supervision, contract management, progress review, quality assurance, and site inspection through the full construction cycle.
View serviceConsulting Support
Local engineering support for clients, funders, project teams, bid preparation, review assignments, and constrained delivery environments.
View serviceSurveying
Topographic surveys, condition surveys, reconnaissance, and field data collection to support infrastructure planning and delivery.
View serviceGeotechnical Engineering
Site investigation, drilling coordination, test pits, materials review, lateritic soil experience, and engineering recommendations.
View serviceMapping Services
Mapping and GIS-supported outputs that combine field observations, background mapping resources, and infrastructure planning needs.
View serviceFeasibility Studies
Feasibility studies, economic analysis, preliminary design, environmental and social scoping support, and funding-stage documentation.
View serviceAsset Management
Facility audits, condition assessments, dam and water infrastructure inspections, road asset review, and practical maintenance planning.
View serviceSelected Work
Road, bridge, drainage, geotechnical, and urban assignments.
Design, design review, construction supervision
Wilkinson Road Rehabilitation
Freetown, Western Area
Design and construction supervision for the rehabilitation of Wilkinson Road, a 9 km urban road assignment in Freetown.
Design and construction supervision
Freetown 25 km Roads Project
Freetown, Western Area
Design, design review, contract management, and construction supervision for selected Freetown city streets.
Feasibility, tender documents, construction supervision
Tokeh-Lumley Road Project
Western Area Peninsula
Reconstruction of the final section of the Goderich-Waterloo Rural Coastal Road between Tokeh and Lumley.
Management and construction supervision
Kailahun-Buedu Road Project
Kailahun District, Eastern Province
Construction supervision for the 25 km Kailahun-Buedu section of the Kenema-Koindu corridor.
Legacy and Stewardship
Grounded in Sierra Leone, prepared for the next generation of delivery.
Founded by Engineer Edward J. Davies and shaped by the long leadership of Engineer Sam Leigh, EDA continues with an emphasis on disciplined engineering practice, responsible stewardship, and infrastructure suited to Sierra Leone's needs.
About EDA