An office assistant performs administrative tasks to support daily business operations. They handle responsibilities such as answering phone calls, managing schedules, and organizing files. Often the first point of contact for clients or visitors, they play a prominent role in creating a welcoming environment.Office staff responsibilities include performing clerical and administrative duties for an office. Clerical duties support the day-to-day operations of an office, including answering phones, sorting mail, scheduling meetings, and business trips, welcoming visitors, and filing documents.