Sounds/looks like a combination of Greco-Roman wrestling with some Judo-type throws included--reminds me a bit of native-american wrestling. It's also sport-based, which makes it quite different than the Ryabko-based Systema, which has no rules and as a military system can be quite devastating; or even Sambo which includes a lot of ground-work and locks. It's hard to tell from a few photographs and a paragraph of text, though. I haven't heard of anyone around here teaching it. There's a Systema school in Longmont if you're interested in taking RMA.