Within The Company
In House, Inside The Company
noun, の adjective
When you're doing something inside the company you're doing it within the company or in-house. For example, we do our kanji in-house. It gives it that artisan flavor.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
The company has in-house designers.
White desks are popular in the company now.
A message about the company party came as an internal email.