Katrina Borra began her legal career working in the biggest law firm in the country, Sycip Salazar Hernandez Gatmaitan. She has since acquired an extensive professional network, having worked as in-house counsel for a private corporation and with several government agencies such as the Supreme Court, Office of the President, Food and Drug Administration, Public-Private Partnership Office, and Philippine National Oil Company. She has also liaised extensively with the Department of Environment and Natural Resources, the Register of Deeds, and the Bureau of Internal Revenue.