Short is president of private equity firm Lone Star Funds
New Sunderland owner Ellis Short insists he will not interfere with on-field matters following his takeover at the Stadium of Light.
The United States-based businessman bought the remainder of shares from the Niall Quinn consortium on Wednesday.
However, chairman Quinn will continue to oversee football matters.
"Niall knows more about football than I ever will, so I will be in the background and Niall will be running the show," Short told the club website.
"I will be involved in things like finance.
"With me coming in, you get all of these other good ingredients that are already in place at the club and can add to that a streamlined decision-making process, a streamlined board and with some financial ability to make some moves - and we think that is the missing piece that this club has needed."
Short's first objective is find a replacement for manager Ricky Sbragia, who stepped down from his duties at the end of a tense season.
The Wearsiders secured their Premier League status on the final day of the season, despite going down to a 3-2 defeat at home to Chelsea.
"Probably like every other good Sunderland Football Club fan, I'm ecstatic and if I had to pick one word, it would be 'relieved', relief that two months of fear and nervousness is over," revealed Short, who looks set to fund a summer spending spree to strengthen the squad.
"This club has a lot of reasons to stay up. We have got a lot of good plans for the future and relegation would have been horrible, so I'm relieved and happy."
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