Daily and weekly checking of all material used on site for compliance, availability and quality. Supervision of the contractor's testing work. Oversee materials selection and testing for the project. Provide technical advice to on issues affecting materials associated at site. To ensure all lab equipment’s are certified and calibrated. Request Third party assessment when required. Review and approve concrete trail mix design and asphalt mix design. Writes technical descriptions specifying material qualities and properties, utilizing knowledge of material standards and construction procedures inline with Contract Documents (architectural, engineering and drawings and specifications) & relevant BS, ASTM, AASHTO Standards. Review the Material submittal proposed by the Contractor in compliance with Contract Specification and applicable codes/standards, which are followed in the industry and recommend the Material submittal to Client, also maintain the material sample library. Review the Material test results and reports submitted by contractor. Deal with any other duties that may be assigned from time to time by the Senior Project Manager and the Resident Engineer. Ensure that the quality of the work is delivered according to the KEO's Safety Management Plan / Quality Plan, PMS and to the satisfaction of the Client. Quality checking of GRP pipes and uPVC pipes, Steel. Participating the Quality-auditing schedules for internal and external. Oversee materials selection and testing for the project. Provide technical advice to on issues affecting materials engineering.