I tried to change engineers from "People" to "professionals", as is indicated in the first paragraph by the requirement of 4 to 6 years in training and passing of board exams. The "Physician" page uses similar vocabulary. This page is talking about licensed professional engineers that have specialized. Someone who calls themselves an engineer without licensure is not recognized as an engineer in many jurisdictions. The type of occupation is listed as "Profession" underneath the picture. I've thus reverted the change back from what Engineeringworld2 put.
A discussion is taking place to address the redirect List of famous engineer. The discussion will occur at Wikipedia:Redirects for discussion/Log/2020 June 27#List of famous engineer until a consensus is reached, and readers of this page are welcome to contribute to the discussion. 1234qwer1234qwer4 (talk) 16:20, 27 June 2020 (UTC)
A discussion is taking place to address the redirect List of famous engineers. The discussion will occur at Wikipedia:Redirects for discussion/Log/2020 June 27#List of famous engineers until a consensus is reached, and readers of this page are welcome to contribute to the discussion. Regards, SONIC678 16:41, 27 June 2020 (UTC)
The vast majority of engineers in the US, most of whom have at least 4-year degrees in engineering, are NOT "professional engineers". "Professional engineers" are licensed and regulated by the states and this is generally required for only small subsets of jobs that generally deal directly with the public or have significant public safety or public policy implications. This licensure is not required for the vast majority of working engineers. I have worked as an engineer for 25+ years and the vast majority of my peers did not need it.
This article is written in a confusing way that spends a lot of time on licensing and regulation instead of what engineers actually perform and accomplish. Since there is a whole different article titled Regulation and licensure in engineering, we should strip out most of the licensing information and replace it with something like "Some engineering jobs may be required to be licensed in certain countries. See link" and leave it at that.