Mark Gregory has been appointed group chief financial officer as a result of the move, having successfully turned around the savings division.
Under his leadership the business increased its operating profit from £7m in 2008 to £133m in 2012. Assets under advisement grew from £46bn to £100bn over the same time period.
John Pollock is taking over responsibility of the savings division, while Mark Zinkula will head up the unit trust business of LGIM.
In a statement, group CEO Nigel Wilson said: “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 RDR, auto-enrolment and platforms.”