The change in my company over the past 15 years has been phenomenal. When I started there, my branch office had a half dozen "admin" staff, dispatchers, parts clerks, three managers (one for sales, one for admin and one for technical) and three supervisors (one for sales and two for technical).
Today, there are only two of those people left. The sales manager and myself (I'm the tech manager). Technicians are self-dispatched as service calls come in over the web and page out. Billing is mostly automated. I enter the technicians expenses into a software program and checks are automatically cut for them and mailed out. Parts and supplies are automatically replenished and shipped to the technicians directly - all I do is review the orders on-screen. About a hundred other innovations I won't even bother to go into.
But our total staffing continues to decrease even as our revenues and gross margin increases year after year. Bascially the way it is in my company, if you aren't in the field selling or out in the field turning a screwdriver, your job is in jeopardy. Even I'm not taking my management job for granted. I've already gotten certified on Microsoft systems and keep myself up to date technically just in case it is decided that branch managers are no longer needed.
You will then find yourself up against a whole bunch of experienced unemployed IT people competeing for jobs that have been offshored.
Managers are a DRAG on productivity, and you'll notice that the only sectors where managers are still growing as a % of total workforce are in academics and the GOVERNMENT!! Surprise, that both of those are unproductive.