Retired now, but if I go way back in time to the start of the main career of my life (it was #4 chronologically), there was a career ad in the local paper, a large US based industrial company needed a FORTRAN programmer. The hard science degree I had mandated a couple FORTRAN courses back when I got my degree plus I used FORTRAN on many other courses to process arrays and iterative calculations. My second job out of University involved FORTRAN and Assembly language so I at least knew I could probably do the work required in the ad so I applied. The rest is history.