Conversant (adjective)

1. Familiar with a particular subject or field; knowledgeable.
2. Having experience or knowledge of a particular subject or field.
3. Having had experience with or knowledge of a particular subject or field.

Origin:

From the latin conversari meaning "to associate with" or "to keep company with".

Examples:

1. She is conversant with the latest research in her field.
2. He is conversant in several languages.
3. The lawyer was conversant with the laws of the state.
4. The engineer was conversant with the latest technology.
5. The doctor was conversant with the latest treatments.