If you are looking for information about the life and career path of individuals that made contributions to STEM, then the best starting place is EBSCO Discovery Service.  

Simply put the name of the person in the search box and mark full text.  You can also put quotes around the person's name in the search box. Look for items identified as ebooks.  These will give you an overview of the person's life.  You may find articles as well that talk about the contributions the person made to the STEM.