Hell Let Loose: Vietnam Wiki - Classes
Commander (Command)
Team-wide leadership
The single Commander role per team, coordinating overall strategy across all squads.
Squad Leader (Infantry)
Squad leadership
Leads an individual infantry squad within the wider 50-player team, coordinating with the Commander and other squads.
Rifleman, Grenadier, Engineer, Medic, Specialist, Machine Gunner (Infantry)
Core infantry roles
The confirmed core infantry roster, covering general combat, explosive support, fortification, healing, specialized equipment, and sustained suppressive fire respectively.
Spotter, Sniper (Recon)
Long-range reconnaissance and elimination
The confirmed Recon unit roles, working as a pair to spot and eliminate targets at range.
Pilot, Logistics Officer (Helicopter, US-exclusive)
Aerial operations
A series-first role pairing -- the Pilot flies the UH-1 Huey for insertions, extractions, and fire support, while the Logistics Officer manages payloads and supply drops.
Armour and Mortar Squad Roles
Vehicle and indirect fire support
Additional confirmed unit types (Armour, Mortar) rounding out the full role roster -- exact individual role names within these units, and the precise total role count (17 per Steam, 19 per the official game site), had not been finalized in official sources as of this writing.