Survival skills may be quite different than what you think they are.
Here are a couple examples.
A) ability to build a wood-gas engine for a vehicle
B) ability to make a battery
C) create a manual control for a device which had an electronic control
D) device means of communication, short and long distances
Survival seems heavy on electrical and computer engineering, doesn't it?
to rebuild civilization, yes.
someone able to reverse engineer a useful complex machine to the point of being able to create (with existing tools and materials) something, or more likely several somethings, to take its place will be in high demand. as well as those with medical and agricultural knowledge.
anyone can make fire with some sticks. utilizing that fire beyond its obvious heat value for cooking/warmth? less are able to do that, and thats the 1st step to rebuilding.