three (3) years or more ) including  theoretical knowledge and technical competence in the analysis and interpretation of results for chemical or biological materials, including the classes of substances and methods used in doping;  - Knowledge of relevant Technical Document s, Technical Letters , Laboratory Guidelines  and other technical standards;  - Experience in the use  of relevant analytical techniques such as chromatography, immunoassays, electrophoresis or mass spectro metry;     ISL – January 2021 Page 69 of 160 - Adequate training in the Laboratory ’s Management System and thorough understanding of its application into Laboratory  processes.