How should he actually handle the dismissal Is there anyone that he should consult before dismissing DuLac?

Before proceeding with the dismissal of DuLac, he should consult with the Human Resources department to ensure compliance with company policies and legal regulations. It may also be beneficial to discuss the situation with his direct supervisor or a trusted mentor for guidance on handling the dismissal professionally and empathetically. Additionally, reviewing DuLac's performance records and any relevant documentation can help ensure the decision is justified and well-founded.