Specialist

Specialists are professional in specific and rare field, making them very valuable asset in the dwindled remains of mankind. They allow progress in the Civilization phase. Specialists can also be taken as officers during missions, but risking their lives may prove to be detrimental if things don't go according to plans.

Medicals
Number of medical persons sets the limit for maximum population. When aboard a cruiser, medicals allow the crew to ignore first crew casualty suffered.

Engineers
Engineers provide Engineering points, which allow development and cruiser manufacturing. When aboard a cruiser, engineers allow the player to re-roll Internal Damage Roll once.

Scientists
Scientist provide Research points, which allow acquisition of technologies and survey points. When aboard a cruiser, you may explore anomalies. When exploring, scientists provides double research points next turn, given that they survive.