Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: A top civil servant joined financial firm Greensill Capital as an adviser while still working for the government, a lobbying watchdog has revealed.

Greensill: Top civil servant 'joined firm before quitting'