how did you get from a shelf stacker to a researcher?

Question: how did you get from a shelf stacker to a researcher?
- Keywords:
  career,
  inspiration,
  job,
  scientist
Asked by nikhilk88 to Sean on 14 Mar 2012. This question was also asked by huan.
- Sean Murphy answered on 14 Mar 2012:
  
  During school I had to work on weekends and holidays to earn money. My parents were not rich, so I needed to save my money to be able to go out and buy a car etc. I always had school as a priority because I knew I didn’t want to work full time in a supermarket. I think working when young make you appreciate how important it is to get good grades so you get get a good job.

Question: how did you get from a shelf stacker to a researcher?