Jackie Sadek is a housing expert and a former special adviser to the secretary of state for communities and local government Greg Clark. She is chief executive of UK Regeneration; her biography on the organisation's website as September 2015 states that she is currently on secondment to the 'minister for cities'[Clark]. 
On 24 August 2015 Sadek announced in the Estates Gazette that she had re-joined Clark in a more senior role as 'specialist regeneration adviser'.
- As trailed in my blog of 22 July, I have re-joined Her Majesty’s Government, in a somewhat more senior and empowered role than before, and needless to say I am very excited about it all. Things have taken a little while to settle down (and apparently this is par for the course in a change of government), but I am now properly ensconced in the Secretary of State for Communities and Local Government’s ministerial office as specialist regeneration adviser. Greg intends to make a real difference, and it will be a huge honour to support him with all the agendas that I care so passionately about.
- ...And secondly, I’ve been labouring with CLG civil servants (as I was formerly in the Cabinet Office) on all the due diligence for me joining Greg Clark’s ministerial office. I have to say the senior CLG civil servants are a revelation: a delight to work with and a total credit to public service. But they are a bit nonplussed and/or diverted by how many retired civil servants of their acquaintance that there are working away (on no salaries, all for love) in the UKR team. And, needless to say, my experience of having dealt with that department, and its many forebears, as a stakeholder over two decades, is proving to be invaluable. 
Sadek is an urban land developer. She started her career at the London Docklands Development Corporation, before joining Stanhope plc. In the 1990s she joined the site acquisition team at Tesco plc and then joined Paddington Regeneration Partnership. From 2007 to 2010 she served as head of regeneration for CBRE Group.