Did a quick google search of his name, turns out his time at News Corp was limited, and it didn't end on good terms

Early on Friday morning, News Corp Australia announced that Williams had resigned, just 20 months into the job. In a letter to staff, Williams thanked his colleagues, while admitting that "the issues encountered have at times been frankly really confronting". Confronting, indeed. In his short and tumultuous tenure, Williams had managed to not only alienate some of the company's most senior editors, most notably Chris Mitchell, editor of The Australian, and Paul Whittaker, editor of The Daily Telegraph, but infuriate Lachlan Murdoch, the man who had originally got him the job. "News Corp might be a publicly-listed company run out of Delaware, but there's never any mistake that you are working for Rupert," former Sunday Telegraph editor Neil Breen says. "It's a family company. You run it the Murdochs' way or you don't run it at all."

The source of the above quoute: https://www.smh.com.au/business/companies/making-the-wrong-enemies-how-williams-was-cut-down-at-news-20130809-2rnsx.html Which was a Wikipedia citation: https://en.m.wikipedia.org/wiki/Kim_Williams_(media_executive)

If he managed to anger them so much while he was employed by them, hopefully he can anger them even more de-shitifying the ABC.