The disqualification means Sixsmith cannot manage, control or be a director of a company until 2020.
The court found that Sixsmith had allowed his father Richard Sixsmith to act in the management of mortgage brokering company Bridgewater House despite Richard having already been disqualified from directorship as well for a period of five years in relation to misconduct.
Sixsmith allowed his father to act as a director of the company in all but name, despite acknowledging to the Office of Fair Trading that he would not allow his father to act while disqualified.
Claire Entwistle, director of company investigations North at the Insolvency Service, said: "In this case the directors attempted to circumvent the disqualification by a client and brokerage referral system. Directorship is not defined solely by the names listed at Companies House, it is the actions in respect of the company that define who is acting as director.
"Where disqualified directors continue to manage the affairs of a company, they will find that the protection of limited liability is not given to them and they may be criminally prosecuted.
"Likewise the Insolvency Service will act robustly against those who allow disqualified directors to act."