Yep, Greenfield is still family controlled. Lewis Reinhold is the current head serang, and has been for some years now.
His dad Theo was the founder, and this obit cites him as also being involved in the startup of Rover:
http://www.power-equipment.com.au/article.asp?ArticleID=2276Interestingly, Lewis also ran a 'hobby business' on the side from 1991 to 2010. This was Beeman Australia, an importer and distributor of the Beeman and Theoben brands of air rifles, and a number of other brands of air rifle accessories and sights.
He closed it down after Greenfield's last relocation, as it was too difficult/expensive to transfer his firearm dealers licence to the new premises.