After 21 years as the Open's tournament director and 13 as Tennis Australia CEO, Tiley is moving on to take up the same role at the USTA.
But with work still to be done before exiting the stage where he was front and centre of the AO for two decades, Tiley isn't ready to spruik up his plans to make, as Donald Trump might say, the US Open great again.
With dated facilities at the Billie Jean King Tennis Centre, the New York major has fallen behind Wimbledon and the Australian Open in the grand slam pecking order.
Tiley, though, has no plans on going in all gung-ho when he takes the reins and, inevitably, attempts to transform the US Open into a sporting and entertainment juggernaut like he did at Melbourne Park.Â
"I'm not there yet, so there's a lot of listening and learning I've got to do," the 63-year-old told AAP.
"I need to talk to people before I can sit down and say, 'Have you thought about this? Have you thought about that?'
"I'm going to bring a depth of leadership experience I've had in sport and entertainment that hopefully is beneficial and adds value to their outcomes.
"But the US Open is a highly successful event and they have a highly successful team.
"So I'll go over there and do what I need to do and have a clear strategy."
In the meantime, Tiley remains committed to TA and helping the governing body appoint the right successor and continue to grow the Australian Open.
He offered a firm "no, no, no" when asked if the Melbourne major was in danger of ever losing its "Happy Slam" status to America.
"The Australian Open will be even bigger and better. I'm 100 per cent confident," he said.
"We've got a plan for the next four or five years for the Australian Open. So it's just executing on that plan.
"We'll deliver great outcomes. I'm going to be here for a while still."
When he does arrive in the US, Tiley - whose wife's family hails from Chicago - will share his time between the USTA's two headquarters in New York and Florida.
"I lived in the US for 20 years, so I know a lot of people there and there's a lot of great people that do a lot of great things," said the former US college coach.
"I think it'll be fun connecting with them again as well.
"So I looked at that and the (Australian) organisation is in the best possible position it could be, and it's on a trajectory for ongoing growth.
"It's also good, you know, 20 years I've been here 13 as the CEO, and sometimes it's good to give someone else a go as well."
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