Computer hardware engineers are important because they design, develop, and test computer systems and components. They are responsible for ensuring that computer hardware is functional, reliable, and secure, and they play a crucial role in the development of new technologies and products. Computer hardware engineers work in a variety of industries, including computer and electronic product manufacturing, research and development, and engineering services. They typically work full-time, and may be required to work long hours to meet project deadlines and solve technical issues.