But he has a wealth of experience in turning around troubled companies and he hopes that can win over the Rangers support.
The 65-year-old multi-millionaire is the chairman of Miller Industries, based in Chattannooga, Tennessee.
The firm describes itself as "the world's largest manufacturer of vehicle towing and recovery equipment".
Detroit-born Miller is best known in American motor racing circles for his support of NASCAR and IndyCar events.
However, he has also built a reputation in business circles of resurrecting 'dead' companies.
Growing up in Detroit, Miller had planned to work at Ford, but his father convinced him to ditch his plan and go to college instead.
He enrolled at the University of Michigan, where he earned a degree in engineering, and later got an MBA. He worked for a variety of large American firms before earning his first major role, as President of Flow Measurement, in 1987.
He formed Miller Industries in April 1990 and employs 760 workers who make tow trucks under a number of brands.
The company made £68million in sales in the last three months of 2011 alone and registered gross profits of £10.8m.
The firm was formed by finding a troubled company, resurrecting it and then expanding by taking over other firms.
In addition to its headquarters and manufacturing plant in Chattanooga, the firm also has facilities across the world, including in Britain and France.
However, Miller owns only around 3% of the company, or about £3.1m in stock.
Initially, he lost £3m but by 1994, he'd made a profit of £2.7m. But, just three years later, his sales rocketed to £225m.
Now, as preferred bidder, Miller is in pole position to takeover Rangers.
But he has failed in previous sporting ventures, including recent takeover attempts of English football clubs, Sheffield Wednesday and Tranmere Rovers.
He also failed in his attempt to launch Team Racing Auto Circuit, which was supposed to rival NASCAR.
He is understood to have worked for the US Military Intelligence, serving as a code breaker in the Vietnam War.
