Andy Nelson, CIO of the Department for Work and Pensions (DWP), has handed in his resignation after just over a year in the role.

He was appointed CIO at DWP - which is responsible for the troubled Universal Credit rollout - in February 2013, taking over from Philip Langsdale, who passed away at the end of 2012. Prior to his DWP role, Nelson was government CIO and Ministry of Justice (MoJ) CIO.

"After four and a half years in the civil service, Andy Nelson has decided to step down as DWP's CIO. His work has included improving the day-to-day running of the department's IT and welfare reforms," a DWP spokesperson said.

"The DWP has a strong IT team in place, and Andy will continue in post until the summer to ensure continuity and an effective handover to his successor."

DWP declined to say who will replace Nelson when he goes. The government CIO role was scrapped when he moved to DWP.

Nelson joined the MoJ in September 2009, and under his role as government CIO was responsible for the development of the G-Cloud framework. Before joining the civil service, he held a number of IT and business change posts at RSA Insurance, GE Capital and Asda.

At DWP, Nelson has been in charge of the government's major welfare reform project Universal Credit, which aims to combine six benefits into one.

The project has been plagued with problems, with evidence given at a Public Accounts Committee (PAC) suggesting that DWP may write off over £174 million of the IT assets that have been developed so far by IBM, HP, Accenture and BT.

The latest development with Universal Credit was that its completion has now been delayed beyond the original 2017 deadline.

Other government CIOs who have left in recent years include HMRC CIOs Mark Hall and Phil Pavitt, who both left to join insurance company Aviva.