**Responsibilities:** * Conduct tests and analyses on concrete, concrete blocks or ceramic blocks, and mortar. * Provide on-site support at client construction sites, where samples will be collected for slump tests (training will be provided). * Cast test specimens in metallic molds measuring 10x20 cm (training will be provided). * Demold test specimens in the laboratory. * Identify samples using wax pencils and place them into immersion tanks for curing. * Collect block samples at construction sites. **Requirements:** * Completed high school education. * Driver’s license category B. * Availability for flexible working hours / travel to branch offices (Bauru and São José do Rio Preto). RESUMES TO: **ecocontroletecnologico@outlook.com** **\+55 16 99720\-3236** Subject line: **Lab Assistant** Employment type: Full-time CLT contract. Compensation: Starting at R$1\.854,85 per month. Benefits: * Commercial agreements and discounts. * Life insurance. * Meal allowance. * Transportation allowance. * Company vehicle. Selection questions: * Are you available for business travel? * Do you hold a driver’s license? If so, which category? * Have you previously worked in the construction sector? * Are you available to work flexible hours, including weekends?