This report, a student's portfolio entry for the PPMP20011 course, focuses on the role of a project manager in commercial negotiation. It examines negotiation methods, conflict management, and stakeholder engagement across different project types and industries. The report analyzes the importance of negotiation in defining stakeholder relationships and resolving disputes, emphasizing the project manager's critical role in achieving project objectives. It references key readings, including Walker & Walker (2015) on collaborative project procurement arrangements, and explores concepts such as relationship-based procurement and the impact of project delays. The report also discusses the application of project management tools for conflict resolution and the relevance of negotiation skills to real-world projects, such as the Chunnel Project. Additionally, the report highlights the significance of communication skills and understanding the motivations of stakeholders in successful commercial negotiations.