Well thank you, I have done my research and know the route Im taking. It is common knowledge if you see the Padi web site PADI Courses , One would go from Dm to AI to OWSI to Speciality Instructor/MSDT to IDCS to Master Instructor to CD... This is the internship I am planning.
PADI:Youre a new instructor? Just finished the IE? No problem. See your Course Director for PADI Specialty Instructor Training and the Master Scuba Diver Trainer Prep Course.
Well, as usual we are a little off topic from the OP, but just to clarify the above quote is from the PADI Master Scuba Diver Trainer Course details page. Other than the title of the page, the only course mentioned is the MSDT Prep Course.
There are many MSDT's that never took a class after passing their IE. For each Specialty Instructor rating, you may just submit a form and fee. On the form you state that you have the required number of logged "boat dives" and that you will follow the teaching standards of the PADI Boat Diver Specialty.
The Specialty Instructor application can be used for up to 5 Specialties on each form (a coincidence?). After certifying 25 OW divers, an OWSI could send in one application for 5 Specialty Instructor ratings, with the $250-ish (USD) in fees. A week or so later (after processing) send in the MSDT application with the $50-ish fee and blamo your a MSDT. No course necessary.
I can not find in my Standards that MSDT is required for IDCSI or MI, but all that would be required is submitting the application and fee. No course necessary. My MSDT Prep course was part of my Resort Pro course, which was really just an extra chunk of change I wasted on a few more days working for Ocean Divers without pay.