There is no magic formula of how to perform within your job and not get fired. Every company is different, with different managers, employees, situations, and laws that apply to each based on their location. Can you be fired without warning? The short answer is it depends.
Generally, once an employee has committed an act of gross misconduct, the employee can be fired without warning. For example, stealing from your employer, hitting another employee or vandalizing office equipment may land you with a pink slip in a hurry. Gross misconduct rules should be equally applied to everyone from the top to the bottom of the organization. In addition, being a top performer doesn’t exclude one from the consequences of gross misconduct. If an employee is the top salesperson but uses illegal drugs at work, that employee may not have a secure job. Aside from steering away from gross misconduct, there are a couple of additional actions you can take that will help decrease the likelihood you’ll be fired without warning.