A business agent is a title, used in some labor unions, for a leading representative of a local union.
It is commonly a paid, full-time position.
[1] It can be abbreviated B.A.
[1] The duties of a business agent may vary greatly from union to union, but in general, a business agent can be expected to safeguard workers' rights under a collective bargaining agreement and act as a liaison to other representatives higher up in the union organization.
[2] The title is common in labor organizations in the United States and Canada, uncommon elsewhere.