The Italian arrived in January last year and has since set about turning around the Whites' fortunes.
The Whites have so far brought in six players - with Chris Wood and Stuart Dallas the stand-outs - and a deal for Watford’s Fernando Forestieri is thought to be close, with the Telegraph claiming that a £3 million fee has been agreed.
The German is pleased with the work being done behind the signs and singled out Cellino’s personal investments as evidence for his commitment to the club.
“I can’t tell you what is agreed with Watford, but I can tell you Mr Cellino had used his personal money to buy off the debt and from this summer on this club can move on,” said Rosler.
“Mr Cellino wants to do very well for this football club. He wants to back me and support me, and wants to bring in the right player at the right price at the right age.
“So far, the signings we made have shown that. Stuart Dallas, Chris Wood, Lee Erwin, they’re all in the same bracket. Forestieri is 25.”
While transfer dealings have gone well this summer, results on the pitch haven’t yet lived up to the feel-good factor that was enveloping the club a few weeks ago.
Saturday’s 1-1 draw with Sheffield Wednesday was Leeds’ fourth in four games and the talented bunch are yet to really get firing.
Rosler has the tools at his disposal and will hope to get one of the Championship’s most exciting squads living up to its potential sooner rather than later - with the imminent assistance of Forestieri more than likely.