An applied physicist leverages knowledge and skills from the fields of physics, chemistry, material science, and mathematics to contribute to the research, analysis, design, and development of innovative systems, sensors, materials, and devices. They design and conduct experiments and/or simulations to ascertain physical properties and behaviors. Experiments conducted may involve the measurement, characterization, and testing of equipment and environmental phenomenology using specialized tools. Fundamental physical principles are used to inform the design of systems and sensors, to evaluate their theoretical performance, and to develop algorithms. Areas of application may include: optical systems, energy systems and storage, quantum systems, EO/IR & RF M&S and analysis, and photonics, and new materials. An applied physicist might also contribute to the development and application of new materials related to energy production, harvesting, and storage or to areas as diverse as healthcare, entertainment, or national security.