A mainframe workflow method manages workflow tasks in a mainframe workflow management system. The method includes selecting, by a user terminal, a target mainframe computing system from a plurality of target mainframe computing systems for execution of a mainframe workflow process having a plurality of workflow tasks, and transmitting the plurality of workflow tasks to the selected target mainframe computing system over a communication network. The method also includes storing the plurality of workflow tasks, in a workflow file repository at the target mainframe computing system, and checking the plurality of workflow tasks for inter-task dependencies. The method further includes executing the mainframe workflow process, including selected workflow tasks from the plurality of workflow tasks, by the selected target mainframe computing system, where the selected workflow tasks include user-created workflow tasks and a predetermined number of computer-generated default workflow tasks that are automatically generated having assigned default values.