An account officer handles bookkeeping for a company. As an account officer, your job duties include tracking business expenses, processing invoices and refunds, recording payments, billing customers, and coordinating with collections agencies. In small businesses, you can expect to work independently, but in medium to large companies, you may supervise additional bookkeeping staff. The qualifications for a career as an account officer typically include at least a high school diploma or GED certificate and relevant bookkeeping experience. Some employers may prefer an associate degree in accounting or bookkeeping. You also need excellent mathematical, organizational, and computer skills.