Ideally coworker sabotage should not be an issue in any professional environment but sometimes colleagues can be envious or competitive. Dealing with difficult people is a skill most of us need to have. Use the following steps to handle difficult coworkers.
Confirm and identify the source of sabotage. If you believe that a coworker is taking credit for your work or undermining you in another way, make sure that you confirm that this is actually occurring. Sometimes workplace stress can skew perspectives, so make sure to take a step back and look at the situation objectively.
Document the situation. Once you are certain that sabotage is occurring, document the situation for yourself. Make sure that you identify and save out any relevant emails and documentation that verify that your point of view is accurate.
Set up a meeting with your manager. If this is something that can affect your career, you need to speak up and identify the problem. Set up a meeting with the appropriate person in your management chain and objectively lay out the situation to a person with authority. Send out a non-retaliatory email that objectively rectifies the situation with everyone concerned.
Allow your coworker to save face. Your coworker is someone you will work with in the future. Decrease workplace stress by allowing your coworker to explain the situation and apologize if there was a mistake made. Your objective should be to let your coworker know that you cannot be walked over and that you are a professional who can handle any situation calmly and firmly.
Contact human resources if absolutely necessary. If the situation is irresolvable and your coworker is acting in an unethical manner, then continue to document the situation so you have verifiable information. Set up a meeting with a human resources manager and provide as much information as possible so that they can handle the situation appropriately.