A professional engineer (PE) is a licensed individual who has met specific educational, experience, and examination requirements set by a licensing board. Typically, this includes obtaining a degree in engineering from an accredited program, gaining relevant work experience under the supervision of a licensed engineer, and passing the Fundamentals of Engineering (FE) exam followed by the Principles and Practice of Engineering (PE) exam. The discussion highlights that individuals with degrees in related fields, such as physics, may also pursue licensure as a professional engineer, provided they meet the necessary criteria and demonstrate their engineering competency. Achieving PE status signifies a commitment to professional standards and ethics in engineering practice, allowing individuals to take on greater responsibilities, including signing off on engineering plans and projects.