Receiving, labeling and analyzing samples (blood, toxic, tissue etc.) Designing and executing laboratory testing according standard procedures. Conducting experiments under defined conditions to verify/reject various types of hypotheses using refined scientific methods. Lab Technicians are responsible for receiving, testing, analyzing, recording and reporting results of their tests. Their main duties and responsibilities include: Receiving, labeling and safely storing samples to be tested. Determining and performing tests needed for the analysis and report.