St.George Bank has lost two of its senior IT lieutenants amid an organization-wide IT and operations restructure.

CIO Peter Clare resigned this week part-way through a major restructure of the company's IT and operations which began in May this year.

Clare, slated as a possible future CEO of the bank, left the executive position after a six-year stint at the company, and a week after the appointment of CEO Paul Fegan.

The former IT head will resign as head of the group technology and operations division on December 31 this year.

Clare, who has not been replaced, said he will leave on good terms with the bank and has not decided on future career plans.

"I have enjoyed my six years at St.George and I will greatly miss the people and culture of the organization," Clare said.

Clare, recruited from the Commonwealth Bank, replaced former CIO John Loebenstein in June this year after leading the bank's group strategy portfolio in February 2002.

Lobenstein resigned after a 12-year career where he saw major IT integration projects including the integration of St.George, Advance and BankSA following a spate of mergers.

His retirement triggered the IT and operations restructure combined with other structural changes including the creation of a new retail bank and wealth management division.

St.George IT manager Gary Carter also resigned early this year as a result of the IT restructure.