If nothing else, have the other 2 in the team be stretcher-bearers or some support for the med types, like the guy who sets up their field gear while the doc/nurse focuses on the troops.
But yeah, for my larger merc unit- combined arms regiment (mech BN, armor BN, and infantry BN w/some aero)- I organized a support BN- 3 companies of techs/ammo/supply, platoon or two of medical (cannot remember) and a admin platoon, have to look at the spreadsheet to get actual numbers & break down. The important thing is that Support unit's structure does not match a combat unit's structure- for example, offensive formations work better on a 3 sub-unit structure while garrison/occupying formations work better on a 4 sub-unit structure.
For example, this would hypothetically be my Support BN
Mech Tech Section/Company (shows up as green foot infantry)- apprentices are assigned here
Com Lance Platoon- the green AsTechs in this platoon are apprentices
First Mech Tech Platoon
Second Mech Tech Platoon
Third Mech Tech Platoon
Armor Tech Section/Company- apprentices are assigned here
First Armor Tech Platoon
Second Armor Tech Platoon
Third Armor Tech Platoon
Artillery Tech Platoon
Aero Tech Platoon (ASF/SC/VTOL)
BA/Infantry Armorer Tech Platoon- apprentices are assigned here
Supply Section Platoon
Medical Section
2 Platoons (2 or 3 surgeons, 6 ER/Surg Nurses, 4 PAs, 2 GP docs, 18 general nurses, 13 orderlies/corpsmen)
HQ/Admin Section- maybe platoon
My DS and their crews also administratively fall under the Support BN for organizational purposes. The Support BN has more personnel on the roster than your typical foot infantry BN- 10 infantry platoons vs 13-14 platoons. However, no unit is ever at its full TO&E strength without a few specific things happening. This does not include any personnel from the employer (since support can be negotiated) or any local hires . . .
. . . but I am really cautious about local hires for security reasons. Will I hire 200 day laborers to put together a berm with my engineers in a day? Sure . . . do I want some indig sitting in the HQ office bunker with all the secure computers and coms sitting around them? No fricking way. Heck, I do not want them serving as mess hall attendants either. I mean my uses for natives, even on garrison contracts, would be pretty low depending on what the job is . . . manual labor where I have safety protocols to keep them from measuring my fire base? Probably . . . anything they do that can affect the troops or equipment? Hell no.