So if the skills are organized into three archetypes ... maybe ...
NETRUNNER: Pistols, Hacking, Assassinations, Blades - hacking obviously; described a couple times as the "sneaky build" so assassinations and blades might make sense here; pistols is just to round it out
TECHIE: Engineering, Sniper Rifles, Shotguns, Rifles - engineering is self explanatory; the others are all the guns specializations ... which it would make some sense for a "gear head" kinda character to have firearms expertise since they like to tinker with stuff.
SOLO: Melee, Twohanded, Athletics, Cold Blood - Solo is the one that doesn't have any "obvious" stats since a lot of the stats revolve around fighting, which all fit into Solo. However, these four are my best guess.
I could also see shifting melee over to Techie for sniper rifles or rifles so that each archetype has a melee based skill. Would have loved for rifles (which I assume is like assault rifles) and sniper rifles to get combined under "rifles" and there have remained a "crafting" skill, which was mentioned in the twitter post and by Kyle Rowley last year.