Final answer:
To address a non-performing coworker affecting team dynamics, speak to them respectfully, involve your supervisor if necessary, and maintain professionalism.
Step-by-step explanation:
If you have a coworker who has been at the company for 8 years but is not contributing to the team dynamics or workflow, it's essential to address the issue professionally. Firstly, consider speaking to your coworker directly in a respectful and non-confrontational manner to understand any underlying issues and express your concerns about how their performance is affecting the team's productivity. If this does not lead to any improvements, it may be necessary to involve your supervisor or human resources department. They can handle the situation according to company policy and ensure that the team's effectiveness is not compromised by one individual's performance. It is important to maintain a professional attitude throughout the process, focusing on the impact on work rather than personal feelings about your colleague.