Multiple Domains and Inter-site content sharing

Hello everybody

So, here’s the deal – we’ve got a parent company that operates four companies (a power plant, construction company, real estate company and recycling company) that all fall underneath its umbrella. This company currently has a separate site for each of these companies (five sites total including the corporate site). These sites all have different looks, different functionality, and different domains (which we need to remain different/not sub-domains – i.e. corporate.com, recycling.com, construction.com, realestate.com, and power.com). The sites for each of these companies largely operate independently of each other, with a few exceptions.

Each site will have its own area to post job openings and a news section. However, the parent company will have all of the other companies’ posts listed on it as well. So the corporate site will have tabs in its news and job sections for each of the four child companies.

This means that we are looking for a way so that when any of the sub companies (recycling for example) post either a news article or a job opening, this post is simultaneously posted in the corresponding section of the corporate site, but none of the other sites. We also would need it to go the other way, where the corporate site could post news/job listings relevant to all of the companies on one or all of the other child company sites at the same time. But we would like it so that one of the child companies could not push their posts out to any of the other child companies. Make sense?

These sites currently operate with Ektron as a CMS, but we are looking to try moving them over to WordPress (for a number of reasons) without losing this functionality. We are currently trying to figure out if this would really be a viable option. So I guess my question would be whether this something we can do with WP’s Multisite? Or is there something (plug-in, etc) that may be a better solution? Is this even something WordPress is really even able to handle, or am I barking up the wrong tree? I have no experience with Multisite (or MU, when it was still separate), so any help with this would be appreciated.

Thanks.