He even worked as a manager in a zamindari getting a first hand knowledge of the system.

This allows students to gain first hand knowledge on policing and real life scenarios that the force faces.

Remember, if you don't know about something from your own first hand knowledge, don't discuss it.

Source: I live 15 miles from the transmitter, so it's first hand knowledge.

The lies make my blood boil, having recent first hand knowledge of unemployment myself and I know I'm not the only one.

More typically, as a senior official writing from first hand knowledge observed:

Good to hear from someone with first hand knowledge.

This environment gave Kester first hand knowledge of class and race inequality.

Communities have first hand knowledge about their own problems and what is causing them.

He could not catalog his new acquaintance by any first hand knowledge.