Not sure that Mr Gleeson ever worked for Tipperary. In the timeframe that we are talking about, Tipperary was owned by Warren Anderson, a property developer who built many of the K Mart stores. I am told that he later formed a partnership with an Indonesian company with whom he later had a falling out and had to get the exotic animals off the Tipperary property. [This bit is largely hearsay so don't take it as gospel]. Tipperary has a sealed airstrip of about 2500 metres long and it is also hearsay that Paul Keating had been known to fly in for hunting trips.
Most of the exotic animals went to Mary River - which was a hunting ranch. Some remained on Tipperary and were quite recently involved in a major stoush between Mr Anderson and the NT government who claimed that they were abandoned, neglected etc and provided some bales of hay for them amid great publicity.
I am told that Kevin Gleeson managed his populations quite well and animals were only selectively hunted. Eventually, due to old age and resulting poor health, Mr Gleeson sought to sell Mary River and retire. Unfortunately he died before achieving this. Prior to his death quite a number of animals were sold to the aforementioned mainstream zoos.
The story gets quite vague after this. It was rumoured that the property was sold to Chinese interests although I cannot confirm this. However I have been told that the stock has not been well managed and recent enquiries by a colleague have revealed that not very many remain - the rest having succumbed to predation, drought etc.
The Pygmy Hippo saga, and subsequent preventable death, could fill several chapters of a book and is not for discussion here. Yet!