Kyu Hwan Yeo has worked in a medical office, for a pharmaceutical company, and an international trading company. He knows each company has contracts or information that needs to be kept private for the success of the company. In the case of working in a medical office, patient information must be kept private and secure. Kyu Hwan Yeo worked personally with client information and, in all situations, was a trustworthy individual. He managed billing files, updated patient information, and stored chemical compounds in a pharmaceutical company's database. Now, Kyu Hwan Yeo prepares assignments, maintains service contracts and agreements, and maintains computers.