IQ has nothing to do with jobs. The people that I know with the highest IQ's are precisely the same people who struggled in school, didn't graduate, and now have a hard time finding work.
Edit* Then again, the only people I know who have done IQ tests are the ones who have gotten a psychological evaluation because they struggle to succeed in our society.
Actually, IQ scores predict job performance, academic achievement and overall quality of life (Nisbett, Aronson, Blair, dikeens, Flynn, Halpern & Turkheimer, 2012). Note the word "predict", however.
Reference
Nisbett, R. E., Aronson, J., Blair, C., dikeens, W., Flynn, J., Halpern, D. F., & Turkheimer, E. (2012). Intelligence: New findings and theoretical developments.
American Psychologist,
67(2), 130-159. https://search.ebscohost.com/login.aspx?direct=true&db=pdh&AN=2011-30298-001&site=eds-live