Up to 80% of practising engineers in the US are exempt from certification: https://www.engineeringnz.org/news-insights/how-do-other-countries-regulate-engineers

Up to 80% of practising engineers in the US are exempt from certification: https://www.engineeringnz.org/news-insights/how-do-other-countries-regulate-engineers/ https://www.engineeringnz.org/news-insights/how-do-other-cou... Certification doesn't prevent accidents - the only thing it provides is scapegoats for faulty systems.