An "employee volunteer" is a person who works for a company or organization and chooses to give their time and effort to help others or a cause, usually outside of their normal work duties. Full definition
Many companies offer employee volunteer programs and opportunities in the office. (topresume.com)
We have employees volunteering in all capacities, within various communities we do business in as well as supporting our own initiatives. (rogersinsurance.ca)
Coordinated corporate events and participated in employee volunteer activities, including walks, clothing drives and visits to shelters. (jeffthecareercoach.com)