Quinn was the first CEO of KiwiRail after the country's railway infrastructure and rolling stock was bought back from Toll Holdings in 2008.During his time as CEO Quinn has overseen a $NZ 100m ($US 79m) growth in annual freight revenue together with around $NZ 1.4bn of capital investment in network improvements, new locomotives, freight wagons and passenger rolling stock, as well as Cook Strait ferries.
In a statement, KiwiRail chairman Mr John Spencer said: "With the KiwiRail turnaround plan well initiated the KiwiRail Board feel it is time for a new chief executive to implement the next steps in driving the plan. The board and Quinn want to ensure a smooth transition so that we don't lose our momentum. We will conduct a thorough search for a suitably qualified replacement."
