I'm writing a message which will go out to a global community, so I want to keep the vocabulary relatively straightforward. I'm describing a job which previously has been a little vaguely-defined, but which going forward is expected to be significantly more meaningful, both in responsibilities and impact.
In my draft, I wrote that the position is a serious one, "not a sinecure". However, this only really helpful if someone already knows this (relatively obscure, I think) word. I can, of course, explain more, but I was hoping for some thing succinct. The thesaurus is not helping here; is there another word or short phrase which concisely expresses the same or similar meaning?