There are 12 Designations of Mercenaries:
1. Marksman – Base Defense
2. Hitman – Raids
3. Security Android – Resource Cache Defense
4. Battle Android – Resource Cache Offense (Attacks only)
5. Strategist – Black Site Defense
6. Pilot – Black Site Offense
7. Shield Android – Alliance HQ Defense
8. Heavy Gunner – Alliance HQ Offense
9. Saboteur – Recon
10. Technician – Munitions and Fuel
11. Cargo Android – Rations and Munitions
12. Field Doctor – Fuel and Rations
Each Designation provides a different set of Skills. Keep your Mercenary's Designation in mind when selecting which Mercenary to send with a squad. Not all Mercenaries will be appropriate for all missions. Some are meant to be stationed at your Base to boost Resource production and storage capacity. Collect Mercenaries of all Designations in order to ensure you have one for every situation.