As a GIS programmer, your job is to use programming languages like Python and JavaScript to code software that interacts with geographic information systems (GIS). While fulfilling your duties and responsibilities, you may decide how to analyze and display data for your customer, give presentations to explain the use of your software, debug existing software, and provide ongoing support for existing applications. GIS programmers often work with sensitive and secure information, so you may also need to maintain a security clearance to ensure you can continue performing this job. Many GIS programmers also spend some time researching the latest developments in the GIS field.