Isn't that what the IEEE and ACM is for? I'd argue that there isn't a dearth in "professional/academic societies" or "guilds". If anything there are far too many of them. Before you fall into the trap of inventing the umpteenth "all-encompassing" computing guild, like in that XKCD comic, how about trying to address the underlying problem that you'd like to have solved?
I firmly believe that the problem to solve is much closer to facilitating and recording the results of the ceremonies. That is effectively done in part by the above organizations but, in my opinion, the real problem lies with the follow up about implementation inside of the real world. I do think that USENIX is much better at _that_ than the ACM or IEEE.
Likely because any consistent architecture is going to work fine. And the typical developer is writing code with a business need in mind. So it pays to stick to something simple rather than experiment with new design patterns.
This is also a worthwhile thing to keep in mind. Most decisions made right now are likely to not be an issue if they are consistent. That said, it is still nice to know where the scaling and operational issues may arise given these decisions. It is a fine line to walk between over-engineering and just having awareness of things to expect.
(I'm not via The IET either, but could be in theory. That's part of the problem, it's difficult when there's a lack of resources or examples for our discipline - vs. plenty for others. I also sort of think if I managed it it would just be for the letters, it wouldn't actually be helpful or signify anything relevant. It would be nice if there were something to work towards and achieve in that regard that did actually mean something, and motivated working on useful things.)
Some examples we are currently tackling are secret management and rolling out updates. I can easily find products that promise to solve these. I can find some articles about "how we, at $COMPANY, solve this particular problem." If I am really lucky I can find one or two articles that answer "here is what we, at $COMPANY, do, and here are one or two alternatives we did not like for reasons relevant to our context." It is very difficult to find a proper review that lays out common patterns of implementation and gives a framework to discuss tradeoffs thereof.