Thompson's new job is account director of media, campaigns and digital, in the policy, performance and communications department for Westminster City Council and its trading arm that sells its comms services, Westco.
He took on the role following an 18 month stint in the Cabinet Office to return to his previous employer.
Thompson spent four years working on local newspapers for the Archant Group before moving into comms and joining Westminster City Council as a senior press officer in late 2011.
He was promoted to senior communications and media development manager in 2013 and left to take up the job of press secretary to the minister for the Cabinet Office and deputy head of campaigns at the government department, last January. Thompson was also the deputy head of news at the Cabinet Office.
His Cabinet Office replacement is Davina Collison, a former BBC journalist who was most recently a press officer at the Department for Work and Pensions, from 2015.
She previously spent 13 years at the BBC, starting out as a broadcast journalist specialising in economics and business news before moving into roles looking at communications and audiences – which included a brief stint working on policy and strategy at the BBC Trust.
Commenting on his new role, Thompson told PRWeek: "The Cabinet Office team are a terrific communications outfit, and working with them has been a hugely rewarding experience.
"Local government and central government face many similar challenges in modern day communications. There is already some effective joint working and knowledge sharing and I will continue to play my part so that we can continue to learn from one another."
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