Poseidon Energy employee ID card

 is a miscellaneous item in Fallout: New Vegas.

Characteristics
Similar in appearance to holotapes, two of them are found during the quest That Lucky Old Sun.

Locations
Two are located in HELIOS One, in the solar collection tower. They are past the Mister Gutsy. At the bottom of the multi-leveled stairwell, turn south(away from the protectron), then east into the room. They are in the south part of the room, on the floor near a skeleton.

Uses
Used to activate a repair robot in the solar collection tower to complete the That Lucky Old Sun quest if your repair skill is not high enough to repair the generator yourself.