Security services expanded – Protective Service Detail and Physical Security Operations one will need people trained at setting up defences and protecting important people.
Primitive survival skills, Wood craft, oak tannin and brain leather making,
Geologist – specifically subsurface hydrology and surface limnology post SHTF finding/knowing where to look for fresh potable water will be a huge skill set to have.
Electronics repair specifically radio repairs and engine control units.
The ability to solder electronics- surface mount and through hole.
Ability to read Blue prints, technical diagrams , electrical schematics and understand engineering scales.
Surveying with engineering stake out- Total Station, RTK GPS, and classic steel chain and theodolite - critical to the rebuilding phase.
Communication operator- Morris code , proper net protocols on a crowded radio band how to operate a SSB and CW long distance radios.
Mathematics - modern and classic , Roman math, Babylonian math (think base 60 and sun moon cycles if we lose our time keeping ability the harvest / plantings are screwed unless you can read lunar and solar cycles) the ability teach others to use a Roman abacus, or Chinese abacus as well as the Roman calculi board and or Slide-rule capable should an EMP attack happen forget about calculators and computers. Also Geometry, Trig, Algebra will be needed post SHTF for innumerable issues in rebuilding. I hate to say it but favorite my math professor was right one day math might just save your life.
Here are my skills, but sadly, none of adult children want to “larn-em” - Target and Walmart are so handy, you know!
I can clean and spin wool straight from the smelly old sheep, and know which breeds are good for what kind of wool, what type of garment
can design and knit woolen garments, socks, sweaters, shawls, blankets, using the right wool for the planned use
can thread and operate a loom to weave cloth
can sew clothing (dresses, shirts, pants) from basic patterns
can plant a garden, manage pests with companion planting instead of chemicals
can preserve the harvest with both a water canner and a pressure canner
can also dry the harvest, either by electrical dryers, or the old-fashioned way (sun-drying)
can cook on a wood stove, a camp stove, or more primitive methods.
know enough about nutritional needs to keep people from getting scurvy and other illnesses
can keep baby chicks alive to adulthood for eggs.
know how to train farm dogs to protect home and property.
hand cut, hand piece, and hand quilt bedding.
grind wheat and bake bread
milk a cow or goat by hand
make baskets
Maybe I should auction myself odd as an old granny, good for “larnin’ the young’s, but now much good for plowin’ these days. Can still stir the jam pot, though.