volunteers
n. countable B1 Intermediate US //ˌvɑɫənˈtɪɹz// UK //vˌɒləntˈiəz// vol·un·teers
n. people who offer to do a job or help others without being paid. You often find them working for charities or helping out at local events.
n. persons who freely offer to take part in an enterprise or undertake a task, typically without financial compensation.
The local library needs more volunteers to help with the book sale.
After the storm, dozens of volunteers arrived with shovels and supplies to help the families clean up their homes.
The success of the non-profit organization relies heavily on dedicated volunteers who contribute their professional expertise to various community outreach programs throughout the fiscal year.
Usage
Commonly used with the verb 'to recruit' or 'to manage'.