He was Head of the Latin America department at the Foreign and Commonwealth Office from 2016 to 2019, and in August 2020 took up his appointment as British Ambassador to Slovakia.

[citation needed] After early overseas postings in Prague and Bratislava he took a research sabbatical in Verona (from 1996–97) studying Italian and European history.

[citation needed] Returning to the FCO, he was Head of the European Defence Section in the Security Policy Department between 1998–2000.

He was then assistant Private Secretary to the Prince of Wales 2000–03, Deputy Head of Mission, Havana, 2003–06 and Ambassador to Bolivia 2007–11 before being appointed to the Holy See.

[citation needed] Baker was appointed MVO in 2003 for services to the Prince of Wales, and OBE in 2010.