Officer positions
RogerBW
You must have at least one point in each Required skill; each point makes you more likely to be considered a good fit for the job. Each point in Helpful skills counts for less, but still in your favour.
Leadership is Helpful in any role.
Warfare Branch
Helm
Required: Piloting (High-Performance Spacecraft)
Navigation
Required: Navigation (Space)
Helpful: Navigation (Hyperspace)
Sensors
Required: Electronics Operation (Sensors)
Helpful: Engineer (Spaceships)
Weapons
Required: Gunner (any)
Helpful: Artillery (Guided Missile)
Aviation (Small Craft)
Required: Pilot (Aerospace), Pilot (High-Performance Spacecraft)
Helpful: Mechanic (relevant), Navigation (Air), Navigation (Space)
Naval Gunfire Liaison
(this isn’t usually a full-time job but will be handled by a Warfare officer)
Required: Forward Observer, Navigation (Space), Observation
Helpful: Artillery (Guided Missile), Electronics Operation (Communications), Gunner (Beams)
Engineering Branch
Engineering
Helpful (Required for small ship): Electrician, Mechanic (relevant)
Helpful: Engineer (relevant), Hazardous Materials (Chemical, Nanotech, Radioactive)
Communications/EW
Required: Electronic Operations (Communication), Spacer
Helpful: Electronic Operations (Electronic Warfare), Computer Programming
Damage Control
Required: Armoury (relevant), Electronics Repair (relevant), Mechanic (relevant)
Helpful: Hazardous Materials (Chemical, Nanotech, Radioactive)
Informatics
Required: Computer Programming
Helpful: Expert (Computer Security), Cryptography
Environmental
Required: Bioengineering (Tissue Engineering), Mechanic (Life Support)
Helpful: Housekeeping
Supply
Logistics
Required: Administration
Helpful: Housekeeping
Administration
Required: Administration
Helpful: Accounting, Finance, Merchant, Scrounging
Other Roles
Captain
(Usually from Warfare, sometimes Engineering)
Required: Administration, Leadership, Shiphandling, Tactics
Helpful: Diplomacy, Strategy
Medical
(Its own branch)
Required: Diagnosis, Physician, Surgery
Helpful: Pharmacy (Synthetic), Hazardous Materials (Biological, Chemical, Nanotech, Radioactive)
Staff Officer
(Usually from Warfare)
Required: Administration, Diplomacy, Savoir-Faire (Military)
Helpful: Politics, Tactics, Strategy (Space), Strategy (Interstellar)