Financial services giant Legal & General (L&G) has announced a shake-up of senior management, including the appointment of a new Chief Financial Officer (CFO), as part of a new structure to reflect 'ongoing strategic evolution', the company said on Monday.Mark Gregory, who is currently Chief Executive Officer (CEO) of the Savings business and has been on the board since the start of 2009, is to become L&G's new CFO from the start of next month."I am delighted Mark has been appointed as group CFO," said Chairman John Stewart. "Mark has now successfully delivered the first stage of the Savings transformation and the board is looking forward to working with him as CFO. Mark's appointment shows the breadth and depth of talent in L&G."In other moves, Executive Director John Pollock will take over the responsibility of the Savings division, board-member Mark Zinkula will assume responsibility for the unit trust business of L&G Investments, while the Annuities business will become a separate division led by Kerrigan Procter."The successful turnaround of the Savings business now enables us to re-organise our business in a way which best reflects customer needs and the increasingly digital distribution environment of Retail Distribution Review, auto-enrolment and platforms," said group CEO Nigel Wilson. "Customers want straightforward access to our products and services and the new structure will enable us to deliver this and maximise the synergies between our businesses."