Related technical and advisory services are either undertaken as standalone services or integrated with other services such as in area development planning, project planning and development, engineering design, construction supervision and management, and project implementation support services. These standalone services involve the formulation of policy guidelines and operational manuals; conduct of environmental and social impact assessments and preparation of environmental and social safeguards documents; poverty assessment and plans; gender and development plans; resettlement frameworks and plans; indigenous development frameworks and plans; watershed vulnerability assessments and watershed management plans; and engineering studies.

Engineering studies include the conduct of value engineering/value analysis, hydrology and hydrogeology studies and modeling, groundwater flow modeling, hydraulic analyses and modeling, hydrodynamic studies and modeling; sediment transport modeling, water quality modeling, pollution load assessment and modeling, among others.

Transaction advisory services for public-private partnership projects are included under this service category. It involves the preparation of pre-investment plans, feasibility studies, engineering design and preparation of technical and commercial tenders and contract documents. This type of service includes critical components involving the study of legal and institutional aspects, financial modeling, and investment plan.

Related technical and advisory services account for 21% of both the contract cost and number of projects of the overall CEST project portfolio.