The shop steward: a. Assists in local union negotiations. b. Assists in grievance administration at local union levels. c. Assists in arbitration at local union levels. d. Is employed by the international union. e. Usually the most senior employee.

E. Usually the most senior employee

Explanation:

A shop steward also known as union representative or union steward is an employee of a company or organization whose primary objective is to defend the interests of his or her fellow employees as a labour union member and official. Usually elected by fellow employees to represent them in matters with the management. He or she is also usually the most senior employee.