Job Descriptions: 1.Conduct daily testing with team members; 2.Check daily test report and deal with customer complains; 3.Optimize testing methods according to test standards; Job requirements 1.Bachelor degree or above; 2.Make sure the data accuracy about daily testing result in compliance with SOP and operation manual; 3.Familiar with at least one of the operations: AAS, ICP-OES, UV-Vis, XRF, ICP-MS 4.Develop new testing methods based on standards and be able to improve current testing procedures;