[2][3] Forsyth joined Foreign Policy magazine as assistant editor[4] before launching Coffee House,[5] The Spectator's political blog, in 2007.

[10] On 24 December 2022, Forsyth was hired by Prime Minister Rishi Sunak as his political secretary.

[11] In 2023 the New Statesman named Forsyth as the eighth most powerful right-wing figure in the UK, describing him as wielding "significant influence over key decisions".

She was appointed as the Downing Street Press Secretary under Prime Minister Boris Johnson in November 2020.

[13][14] He is close friends with former Prime Minister and Conservative Party leader Rishi Sunak; they were contemporaries at Winchester College and are godparents to each other's children.