Scientists and engineers are important members of our society. We need science and technology to live in the modern world -- to have products we want, to communicate, to travel, to understand and protect the environment, and much more. See this video, "Optics: Light at Work". The first half of this video provides an upbeat, interesting, and informative orientation to the career of optical engineering and science. Examples of real world applications and examples of exciting new technologies are provided - nanomedicine, space telescopes, invisibility, and solar energy.