**Metal Physicochemical Analyst:** **Requirements** * Technician or professional in Chemistry, Chemical Engineering, or related fields. * Minimum of 6 months of experience in metal analysis (AAS or ICP\-OES). * Training in NTP ISO/IEC 17025:2017, method validation, and uncertainty estimation. * Knowledge of analytical techniques and instrumental control. * Laboratory software (LIMS) proficiency is desirable. * Organized, precise, and results-oriented. **Responsibilities** * Perform physicochemical tests for metal determination in solid and liquid matrices. * Operate atomic absorption (AAS) and ICP\-OES instruments according to standardized procedures. * Prepare standards, reagents, and calibration curves for quantitative analysis. * Ensure internal quality control and result validity. * Maintain documentary traceability and data records in compliance with ISO 17025\. **Submit your documented CV** (work certificates, academic degrees, training, etc.) to phone number **920 471 857**, specifying the position of interest. Employment type: Full-time Application questions: * Indicate your current academic degree and professional or technical field of study. * Are you licensed and/or registered? (Specify which applies). * State your experience as a Physicochemical Environmental Analyst (time in months or years). * Have you worked in laboratories accredited under the NTP ISO/IEC 17025:2017 standard? * Specify your current residential district. * Do you have immediate availability for an in-person interview at our facility located at Km 23\.5 of the Panamericana Sur? * Indicate your salary expectation. Work location: On-site