What is a Professional Engineer?

PE - An Elite Credential 

To the public, the PE credential is the assurance that competent professionals are engaged in the practice of engineering.  To a client, it means you have the credentials to earn their trust. To an employer, it signals your ability to take on a higher level of responsibility.  Among your colleagues, it demands respect. To yourself, it's a symbol of pride and a measure of your own hard-won achievement.
To become licensed, engineers must complete a four-year college degree, work under a Professional Engineer for at least four years, pass two intensive competency exams and earn a license from their state's licensure board. Then, to retain their licenses, PEs must continually maintain and improve their skills and education throughout their careers.
Yet the results are well worth the effort. By combining their specialized skills with their high standards for ethics and quality assurance, PEs help make us healthier, keep us safer and allow all of us to live better lives than ever before.

A century ago, anyone could work as an engineer without proof of competency. In order to protect the public health, safety, and welfare, the first engineering licensure law was enacted in 1907 in Wyoming. Now every state regulates the practice of engineering to ensure public safety by granting only Professional Engineers (PEs) the authority to sign and seal engineering plans and offer their services to the public.

What distinguishes PE from other engineering graduates?

  • In Illinois, you must be licensed to call yourself an engineer.
  • PEs must also continuously demonstrate their competency and maintain and improve their skills by fulfilling professional develop requirements..
  • Only a licensed engineer may prepare, sign and seal, and submit engineering plans and drawings to a public authority for approval, or seal engineering work for public and private clients.
  • PEs shoulder the responsibility for not only their work, but also for the lives affected by that work and must hold themselves to high ethical standards of practice.
  • Licensure for a consulting engineer or a private practitioner is not something that is merely desirable; it is a legal requirement for those who are in responsible charge of work, be they principals or employees.
  • Licensure for engineers in government has become increasingly significant. In many federal, state, and municipal agencies, certain governmental engineering positions, particularly those considered higher level and responsible positions, must be filled by licensed professional engineers.

Steps for Licensure


In order to become licensed as a PE in Illinois, a prospective PE must:

  • Earn a four-year degree in engineering from an accredited engineering program.
  • Pass the Fundamentals of Engineering (FE) exam.
  • Pass the Principles and Practice of Engineering (PE) exam.
  • Complete four years of progressive engineering experience under a PE.