**Description** This position is responsible for performing technical activities related to analytical reliability, sample control, and laboratory process monitoring. It involves the collection, registration, and analysis of representative samples, supporting technical oversight throughout all stages of the production process. It contributes to the preparation of technical documents, development of methodologies, and maintenance of compliance with legal and operational standards. Activities are carried out in accordance with internal procedures and applicable regulatory requirements. **Working Hours:** **07:30–17:00 with 1h30 lunch break / Saturdays 07:30–11:30.** **Responsibilities and Duties** Collect, register, and analyze representative effluent samples according to the monitoring plan; Perform specific analyses and monitor process performance across all treatment stages; Prepare technical reports, preliminary assessments, and operational documents for process control and improvement; Carry out calibrations, adjustments, and minor maintenance on laboratory equipment according to technical specifications; Support studies and research on new analytical methods, equipment, and medium-complexity products; Monitor effluent quality by conducting comparative analyses against established standards; Participate in developing methodologies, standard charts, and studies for acquiring new equipment; Conduct qualification and supplier approval tests according to defined technical criteria; Issue purchase requisitions for laboratory supplies and monitor chemical inventory; Support obtaining and maintaining technical licenses as required by law; Perform inspections and technical visits to treatment plants and laboratory facilities; Ensure equipment integrity and request corrective and preventive interventions as needed. **Requirements and Qualifications** This position is responsible for performing technical activities related to analytical reliability, sample control, and laboratory process monitoring. It involves the collection, registration, and analysis of representative samples, supporting technical oversight throughout all stages of the production process. It contributes to the preparation of technical documents, development of methodologies, and maintenance of compliance with legal and operational standards. Activities are carried out in accordance with internal procedures and applicable regulatory requirements.