An OCA usually manages a variety of administrative tasks such as data entry, filing, sorting mail, answering phone calls, and supporting staff with scheduling and document preparation. Depending on the organization, you might also assist in coordinating meetings, maintaining office supplies, and handling basic correspondence. The work involves frequent collaboration with other team members and departments to ensure smooth office operations. By keeping day-to-day functions organized, OCAs play a vital role in helping the entire office run efficiently.