FSA director of conduct risk and asset management sector leader Dan Waters is leaving the regulator.
He will leave in December and Christina Sinclair has been appointed director of conduct risk on an interim basis.
In an internal message to staff, chief executive Hector Sants said Waters decided to leave because he felt the long-term commitment needed to set up the new regulatory regime “would not be appropriate at this stage of his career”.
Sants said: “It is with regret that I have to inform you that Dan Waters has decided to leave the FSA. He is considering other opportunities that will allow flexibility to pursue his interests here in the UK while allowing him time to meet family obligations in the US.”