I have only been at Pfizer for 3 years as a PHR but am interested in the KAM or ISS job. Do you have to be a DSR to apply?
Nope. Just get the attention of people at the RM level and above, and let them know you want to be one. Make it look good. If you fit a certain demographic and are able to schmoose well and you look good doing it, you will be green lighted. Your DM will be happy to play along because it makes them look good. They will slot you for the next KAM ISS job that comes up and might even create one for you to make it look like you are really good. They will have to post the job and have other people interview but don't worry, its all in your honor. Just play the game.