Tracy is correct that the job title is not really relevant; it is what you do.
In my most recent role I worked as technical presales engineer in sales where I lead the technical aspects of working various stakeholders in responding to RFP and prepare for POC workshop, while my manager and Account Executive handles the business side of the engagement with the prospects/clients. My work experience was audited and approved by PMI. The work experience can be any of the domain areas (Initiate, Plan, Execute, Monitor/Control, Close). For example, you can be negotiate and closing sales contract and used various techniques outlined in the PMBOK guide.
Keep in mind, in additional to 36 months you also need to accumulate 4500 hours that you lead and direct the project, assuming you have 4 year degree. Personally I find it impossible to know the exact hours work on each projects and break it down into each domain. However do you best and make sure you do not exaggerate. Hope it helps.