Steven Zahm@ Bob
re: P3 plugin profiler or Query monitor, we consistently see the Connections plugin using the most resources- around 20% of the load.
P3, you can really take the results of that as only as a very rough indicator. Connections is not causing 20% load. The only page that will have a “hit” would be the directory page where the directory is being displayed and of course its admin pages.
A far much better tool to use is this:
https://gtmetrix.com/reports/cmbonline.org/c9sZe0Xp
I took a real quick look at just your home page. It is 8MB downloaded. Right there, that is one big reason for a slow load time. There is one image all by itself is greater than 1MB.
There is also, a lot, as in almost a couple hundred (rough estimate), of CSS and JS files being downloaded with a large chunk of them coming from Facebook, I suspect that little widget in the right corner of the footer.
Take a look at the Waterfall tab in GTmetrix, that whole last ~20% seems to be just Facebook content. One has to be careful with adding social media stuff to a site as that can add up and really slow down a site.
I highly suggest using WP Rocket (not affiliated with in any way) as they site optimization seems to just work with little setup. You still need to optimize those images. I believe the is a plugin called WP Smush that can help with that.
I hope this helps get you on the right track to better your site load time.