place of new post; new place of appointment
Refers to the location where someone is newly assigned to work, often used in business or government contexts.
His new post was decided to be in Osaka.
I want to quickly get used to life at my new place of appointment.
転勤 is a job transfer, often within the same company; 赴任地 is the destination of such a transfer.
赴任 (moving to a new post) + 地 (place). The compound is transparent and follows standard Sino-Japanese word formation.