McConville (pictured) joins from Lloyds Banking Group, where he was financial director of both Scottish Widows Group and the insurance and investment divisions, on 8 April. He will replace Ann Godbehere, who quit the role over a year ago.
He previously held the positions of director of group strategy, monitoring and planning, and director of finance within Lloyds.
Northern Rock chairman Ron Sandler says: “He brings with him a wealth of experience in all aspects of finance, as well as strategic planning and cost-efficiency. Jim’s role will be central to developing a strong financial focus as the Company moves forward.
“His appointment further strengthens our senior management team and I am confident that we now have in place a group whose vision for the Company is clear and focused.“