said by TKJunkMail :

The trick is to hire and use internal employees for a steady state budgeted workload and then hire contractors for expansion projects and for those times when problems occur(like hurricane season in some locales and ice storms in other locales).

said by bdh :

In theory: sure it sounds great. Being a former Comcast employee prior to the TWC merge, I highly doubt it will happen. There will always be contract work; its simply cheaper than having all the work in-house.