Your duties as an environmental test technician include collecting and testing samples, analyzing the results, and assessing the impact that commercial activities might have on the environment and the health of employees or area residents. Your responsibilities could involve performing tests in a laboratory setting or working in the field to collect samples from water, waste, or other materials. While many environmental testing technicians work for a testing laboratory or consulting firm, you can also work for a government agency to ensure environmental compliance of various activities and projects.