Lloyd-Davies worked for the Conservatives for two years in the lead-up to this year's general election, advising party leader Michael Howard and shadow health politicians.
When the election campaign finished, he looked for a change of role.
'It was frenzied activity for the whole time I was there,' said Lloyd-Davies, formerly senior health policy adviser to the opposition. 'But I have been looking to move into the private sector.'
Lloyd-Davies added that he is expected to use contacts garnered in his previous role to promote Sanofi-Aventis, the world's third largest drugs firm.
Lloyd-Davies effectively replaces Anna Sörman, who is now working for US biotech company Amgen in the UK (PRWeek, 16 September). Sörman was head of brand policy and public affairs.
Sanofi-Aventis initially indicated it would appoint a replacement head of external relations (PRWeek, 23 September) but, after Lloyd-Davies' appointment, no further recruits are expected.
'As far as I am concerned we now have a full team,' said UK comms director Cressida Ward.
Lloyd-Davies will remain a Tory party member, but will not actively campaign.
Sanofi-Aventis last week hired David Keown from Packer Forbes Communications as brand comms manager (PRWeek, 14 October).
Both Keown and Lloyd-Davies are based in Guildford in Surrey.