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The Vault-Tec C.E.O. achievement is worth 30 G

To get the achievement you have to collect 20 Vault-Tec Bobbleheads...
here are the locations.

1. Energy Weapons
Location: Raven Rock
Specifics: Raven Rock Level 2, colonel Autumn's quarters, on table

2. Big Guns
Location: Fort Constantine
Specifics: CO quarters, inside open safe

3. Endurance
Location: Deathclaw Sanctuary
Specifics: Deathclaw Sanctuary, initial chamber, next to corpse pile

4. Explosives
Location: WKML Broadcast Station
Specifics: Sealed Cistern, next to ham radio

5. Speech
Location: Paradise Falls
Specifics: Eulogy's Pad, on table

6. Perception
Location: The Republic of Dave
Specifics: Museum of Dave, bookcase

7. Agility
Location: Greener Pastures Disposal Site
Specifics: Office, on table

8. Repair
Location: Arefu
Specifics: Evan King's House, on table

9. Science
Location: Vault 106
Specifics: Vault 106 living quarters, medical bay eastern wall, on shelves

10. Charisma
Location: Vault 108
Specifics: Vault 108 Cloning Lab, on table

11. Lockpick
Location: Bethesda Ruins
Specifics: Bethesda Offices East, top floor, on desk in central room

12. Small Guns
Location: National Guard Depot
Specifics: National Guard Armory, shelf in equipment storage

13. Sneak
Location: Yoo Guai Tunnel
Specifics: Yoo Guai Den, on metal crate, eastern area of central cavern.

14. Barter
Location: Evergreen Mills
Specifics: Bazaar, Jack's northeast alcove; top right shelf behind the Work Bench.

15. Melee Weapons
Location: Dunwich Building
Specifics: Virulent Underchambers, mall maintenance room

16. Unarmed
Location: Rockopolis
Specifics: Rockopolis, next to Argyle's body

17. Medicine
Location: Vault 101
Specifics: Vault 101, Dad's clinic table

18. Strength
Location: Megaton
Specifics: Lucas Simms' house, sheriff's bedroom on table

19. Intelligence
Location: Rivet City
Specifics: Science Lab, on table

20. Luck
Location: Arlington House
Specifics: Arlington house, cellar shelves