How many support male personnel do we have on duty in the USA?
Not many that don't go to Iraq or Afghanistan sooner or later. Much of the support duties have been handed off to civilians.
Depends on what you mean by "support". Very few in the Army who are not just back, training to go, or about to go. There are of course slots in R&D, procurement and so forth. Some of them are filled by the walking wounded. Others require a combat arms or at a least operations background. If they don't the job is likely getting done by a civilian, either DoD or contractor, and in some cases even if they do. We have one twice retired guy in the office where I work who has been all three, military officer, DA civilian, and now contractor.
We also have a Captain, male, who lost an eye to a bullet. We also have some female officers and NCOs.