Militia medical personnel were seen as early as "
Past Prologue", though their uniform did go through at one redesign in the following episode ("
A Man Alone") before settling on the Brown/Purple by the third of the series ("
Babel").
The medical personnel in the very beginning ("Past Prologue" "A Man Alone") were in cheap throwaway uniforms that weren't seen again. Maybe in part because they looked too similar to the yellow security uniforms. Note again the early red-blue-yellow design.
They may also not have been the more formal standard duty uniforms like Kira's or Odo's but tight one-piece working ones like Rom's. I imagine the standard duty version of them would have looked very security indeed.
On stations I'd suspect that the duties of security and tactical would be separated, we see in "The Way of the Warrior" that is a more logical approach (Odo dealing with repelling boarding teams and coordinating his deputies to contain them, whilst Worf is in Ops manning weapons).
You'd think, but George Primmin didn't last long (did he do much in Ops? I don't remember) and Eddington too I remember more on the Defiant than at tactical. Who was usually firing phasers in the early seasons, Dax or O'Brien?
I think they wanted Odo to be the town sherif and felt that that was enough. Maybe Kira did "strategic operations" until Primmin or Eddington or Worf came along.
Those who stayed and fought would have appreciated the direct tactical value of not having garish uniforms.
The uniforms
were garish. The red and yellow were very distinct -- only the rank insignia were small. Still, generals had epaulets and the navarch had a distinct chest pattern.
Eddington. Or, in case you're playing your "first season" card,
George Primmin.
You're doing it again. There is no "'first season' card." The title of the thread is about my suspicion that they initially reused Odo's uniform, setting a precedent for what came later -- of course that's going to be at the very beginning.
I wish someone would do a photoshop of one of the red or blue (gray) uniforms, turning yellow (brown) so we could see what they would have looked like. It'd be cool. The same for the nursing and engineering uniforms.
...I wonder why Rom wasn't in a gray uniform himself. Was it an enlisted uniform? Maybe the green is the gray for enlisted personnel. I wonder if there's another color for enlisted personnel under the red uniform division.
If security was always meant to be civilian, I wonder why they chose for the pilot the
three correlative Starfleet primary colors uniform design and didn't just create two non primary color correlative uniforms. Why not put them all in military gray and police brown?