Ancillary workers are employees who support the main workforce in an organization or workplace. These workers are responsible for carrying out a wide range of duties, from technical support and clerical work to custodial and maintenance services. There are many different synonyms for ancillary workers, depending on the context of their work. These include support staff, auxiliary workers, service employees, backup personnel, and non-core workers. Other related terms for ancillary workers may include administrative assistants, receptionists, custodians, security personnel, and maintenance workers. Overall, all of these workers play an integral role in ensuring the smooth functioning of a company or organization.