dispatched official; representative; agent
Refers to a person sent on official business, such as a company representative or government agent. Often used in formal or business contexts.
A dispatched official was sent from the head office.
I will be posted overseas as a representative.
派遣社員 is a temporary worker dispatched by an agency, while 出張員 is an employee sent on a specific business trip or assignment.
Compound of 出張 (business trip) and 員 (member, person). The exact historical derivation is uncertain, but the word follows a common pattern for naming roles.