Conversation so far:
What kind of work did David Attenborough do before working at BBC?
David Attenborough took a position editing children's science textbooks for a publishing company.
Did David Attenborough like this type of work?
David Attenborough soon became disillusioned with the work and in 1950 applied for a job as a radio talk producer with the BBC

Question: What did he do at the BBC?
Self-contained rewrite: What did David Attenborough do at the BBC?