Thank you! These look very well-tailored.
As for systems/protocols, all I know at the moment is that some of it currently uses Zabbix. It's multi-departmental so fact-finding goes slowly. I'm an industrial IoT guy at heart, so I'm also eager to determine the current topology.
I've used some proprietary solutions for things like this in the past (OSIsoft PI System, no relation to the Open Source Initiative "OSI")...and Sunbird DCIM looks fantastic. Both are probably a contracting company's dream for earning huge contracts to configure and maintain, and while I'd love to have the features Sunbird advertises, it doesn't feel like the right solution during a cost-cutting year. It also feels like it would be more difficult for the team to maintain.
In addition, my organization has been willing to let employees use their 9-5 work hours to contribute to open source when bug fixes or new features were needed for software stacks we depend on. So it feels good to see some well-developed open source options that we may be able to contribute to down the road.