An engineer is a professional who applies scientific and mathematical principles to design, build, and maintain structures, machines, and systems. They work in various fields, including civil, mechanical, electrical, and software engineering. Engineers solve problems and create innovative solutions to improve technology and infrastructure, making everyday life more efficient and safe. Engineers often collaborate with other professionals, such as architects and scientists, to bring projects to life. They use tools like computer-aided design (CAD) software to create detailed plans and models. Their work can be seen in everything from bridges and buildings to automobiles and electronics, impacting society in numerous ways.