It's bizarre that Digital Realty wants to put a DC in a town centre. Surely the latency disadvantage from being outside city limits is neligible.
At my first job in a bank there was an old-timer whose job had been to fly to every trading desk the bank had in other countries to install software updates. He would do a round the world trip 1-2 times a year with multiple duplicate boxes of floppies during 3-4 weeks.
I used to travel doing optical networking deployments between data centers. Got to see a good 35+ states and even some foreign countries over 4 years or so but also completely burnt out. Telecom is a pretty miserable industry.
Most of the work in/around DCs is contract of some sort. Local structured cabling firms, electricians doing stints of various lengths, security, etc. Some of it good and lucrative, some of it not.