[holding answer 2 November 2009]: The Child Maintenance and Enforcement Commission is responsible for the child maintenance system. I have asked the Child Maintenance Commissioner to write to the hon. Member with the information requested and I have seen the response.
Letter from Stephen Geraghty:
In reply to your recent Parliamentary Question about the Child Support Agency, the Secretary of State promised a substantive reply from the Child Maintenance Commissioner as the Child Support Agency is now the responsibility of the Child Maintenance and Enforcement Commission.
You asked the Secretary of State for Work and Pensions how many staff have been moved from the Child Support Agency to other posts within her Department its agencies and its non-departmental bodies since 1 January 2008 or the nearest date to that for which figures are available. 
On 1 November 2008 the Department for Work and Pensions transferred the functions of the Child Support Agency and its 10,524 people (9,319 full time equivalents) to the Child Maintenance and Enforcement Commission (the Commission).
In January 2009 and in consultation with Jobcentre Plus the Commission brought forward a reorganisation to enable the transfer of people and estate to Jobcentre Plus. This contributed to the Department’s plans to increase Jobcentre Plus staffing to reflect the increasing numbers of clients as a result of the economic downturn. A total of 636 people (551 full time equivalents) and eight sites were transferred to Jobcentre Plus. No other employees have been moved to any other part of the Department outside the Commission other than those individuals who have successfully applied for posts on level transfer or promotion.
I hope you find this answer helpful.