BAS for office building

Dear All, does anyone here can recommend me some open-source building automation platforms for commercial building control, e.g., office building? Or any team working on this field? I am seeking some technical collaboration for our project. Thanks a million to your help in advance!

Well, if you ask a question like this on an openHAB forum you will probably only come up with one obvious answer.

A lot of users on this forum are using OH for office building automation and some industrial control projects.

But be aware that with any opensource product, your company is signing up for the maintenance and administration of the automation. There will not be a company with technicians that can come out and help.