Time to outline your responsibilities and deliverables on the project within the five process groups. As I have mentioned, they are: initiation, planning, executing, monitoring and controlling, and closing.
Here is an example.
IN: I created a project charter and defined the stakeholders.
PL: I collected project requirements and defined the project scope. I calculated project cost and developed project schedule.
EX: I managed project team and communications, engaged with stakeholders.
MC: I validated project scope and controlled quality.
CL: In the end I documented lessons learned and conducted knowledge transition.