• Write, update, and maintain computer programs or software packages 
• Perform or direct revision, repair, or expansion of existing programs to increase operating efficiency or adapt to new requirements. 
• Consult with managerial, engineering, and technical personnel to clarify program intent, identify problems, and suggest changes. 
• Correct errors by making appropriate changes and rechecking the program to ensure that the desired results are produced. 
• Conduct trial runs of programs and software applications to be sure they will produce the desired information and that the instructions are correct. 
• Perform systems analysis and programming tasks to maintain and control the use of computer systems software as a systems programmer. 
• Compile and write documentation of program development and subsequent revisions, inserting comments in the coded instructions so others can understand the program. 
• Prepare detailed workflow charts and diagrams that describe input, output, and logical operation, and convert them into a series of instructions coded in a computer language. 
• Consult with and assist computer operators or system analysts to define and resolve problems in running computer programs. 
• Investigate whether networks, workstations, the central processing unit of the system, or peripheral equipment are responding to a program's instructions. 
• Assign, coordinate, and review work and activities of programming personnel. 
• Write or contribute to instructions or manuals to guide end users.