Conversation so far:
When was George Bernard Shaw born?
George Bernard Shaw was born at 3 Upper Synge Street in Portobello, a lower-middle-class part of Dublin.
Who were George Bernard Shaw parents?
George Carr Shaw and Lucinda Elizabeth
Where did George Bernard Shaw grow up?
Dublin
Why didn't George Bernard Shaw like school?
prisons and turnkeys in which children are kept to prevent them disturbing and chaperoning their parents.“
What did George Bernard Shaw do when he finished school?
October 1871 George Bernard Shaw left school to become a junior clerk in a Dublin firm of land agents, where he worked hard, and quickly rose to become head cashier.

Question: What did he do after he left that job?
Self-contained rewrite: What did George Bernard Shaw do after he left that job?