World's best sustainability coordinator job?

Oxford University!

Not only do you get to look after a good twenty or so separate college campuses, with buildings from medieval to modern, but they own whole British farming villages.

Ah. But the paperwork. All that British red tape. It's not quite that you need planning permission applications and environmental impact statements just to change a shower head.

But it is almost that bad.

Still, there is the remarkable compensation that the next time you dig a hole for, say, a solar conduit, or a sewer, you find Roman remains (a Roman sewer?), or Richard III's body, and so have your project put on hold for a dozen years while the archeologists do their thing.