It's a badly thought-out article that's basically a random link farm surrounded by text, rather than any kind of research.
The first paragraph links to textbooks from the 1870s, and conflates STEM and academia as the same thing.
It's one of those things where you know less after reading it than when you started.
My comment above is more coherent. STEM jobs generally require a college degree, so ensure underpresented groups finish high school and can afford to enroll in college.
Large companies in the US are required to report employee demographic information, so qualified applicants are very welcome there.
