We will also mail a hard copy of your card within business days free of charge. Some explain their work to patients and provide assistance when patients have adverse reactions after their blood is drawn. Water Transportation Workers.

Environmental science and protection technicians monitor the environment and investigate sources of pollution and contamination, including those affecting public health. Kindergarten and elementary school teachers instruct young students in basic subjects, such as math and reading, in order to prepare them for future schooling.

How often is BLS certification renewal required? Nuclear medicine technologists prepare radioactive drugs and administer them to patients for imaging or therapeutic purposes. Physicists and Astronomers.