Performing duties in the control and analysis of operational data from water, sewage, and reuse systems, including preparation of technical reports, performance monitoring of treatment plants, support for operational and laboratory routines, assistance with field analyses, interface with operational and project teams, as well as support for procurement and supply demands. Key responsibilities: \- Recording historical operational data from ETAC + ETA + ETE + EEE + Booster + reservoirs + networks; \- Preparing operational reports; \- Assisting with data analysis; \- Identifying procurement requirements; \- Submitting procurement requests; \- Supporting and monitoring operational and laboratory activities; \- Assisting in the development and monitoring of operational procedures. Requirements: \- Technical degree or currently enrolled in Chemistry; \- Intermediate Microsoft Office proficiency; \- Prior knowledge or experience in water and sewage treatment processes is a plus! Schedule/Location: \- Santana de Parnaíba – on-site work model; \- Working hours: 7:00 AM to 5:00 PM (Monday to Thursday) and 7:00 AM to 4:00 PM (Friday); \- CLT employment regime. Interested candidates must send their resumes to rh@catuiengenharia.com.br, with the subject line: “Vacancy – Operational Technical Assistant”. Job type: Full-time CLT Compensation: R$2,000.00 – R$3,000.00 per month Benefits: * Education allowance * Life insurance * Meal voucher * Transportation voucher Selection questions: * Are you available to work in Santana de Parnaíba? * Do you hold a technical qualification in Chemistry (completed or in progress)? * Do you have intermediate-level Excel skills?