Miller said: "I'm proud to accept the position of Port Vale Chairman and look forward to working with the rest of the Board, the staff and supporter base, to help the club back to better times.”
"I have stated previously that the club is a work in progress. Success will not happen overnight. But if we continue to take steps in the right direction, the pieces will come together and we will have a football club everyone can be proud of. Since my arrival in England, I've been impressed with the things I have seen around the club and the people I have spoken to.
"From speaking to the fans, I fully understand the passion they possess for the club, and the disappointment they have at seeing Vale in the bottom tier of English football. I recognise that the supporter-base has a huge part to play in the present and future of Port Vale. I also recognise that we need to evolve our operations throughout the club to ensure that we're not only competing on the field, but off the field too."
The news coincides with the announcement that the Board will also appoint a fans' representative who will have full voting rights without the financial responsibilities that usually come with the post.
Confirming the arrangements Vale chief executive Perry Deakin also revealed that the board would have a say in who gets the supporters' seat.
He said: "The supporters' representative will have full voting rights, but because they won't be registered with Companies House they won't have to sign any financial guarantees.
"Clearly, if we are going to have to have another director on the board it makes sense to make sure we can work with them."
The appointment process, which is being coordinated by the Port Vale Supporters' Club, has not yet begun, but it is understood the successful candidate will not require shareholder approval to secure their directorship.
Deakin, who is also a Vale director, initially suggested the supporters' club would hand over their short-list of candidates for the board to rule on the appointment. But he has now "agreed in principle" to forming an interview panel consisting of both board and supporters' club representatives.
The move was boradly welcomed by the Vale supporters club.