As per the Daily Mail, Jason Knauf is parting ways with The Firm because his husband accepted a diplomatic position in another country. In his resignation statement, Knauf said that "Working with The Duke and Duchess of Cambridge has been the privilege of my career." William and Kate also expressed their sorrow at his resignation and best wishes for his future. He's due to continue in his current role until the end of the year.
If we had to take a guess, The Duke and Duchess of Cambridge are probably feeling bleak. After Knauf stopped working for Meghan and Harry as their communications secretary (during which time, per BBC, he was involved in drafting that infamous letter to Meghan Markle's father) he became William and Kate's communications secretary. In 2019 an insider told Vanity Fair that Knauf was "their guy." The plot thickens: Knauf was appointed chief executive of the Duke and Duchess of Cambridge's Royal Foundation only after the Duke and Duchess of Sussex convinced the foundation's former chief executive to work for them.
So, is Jason Knauf giving up a dream position to make way for his partner's ambitions? It's certainly plausible. It's also worth pointing out that the British royal family has a history of finding jobs in other countries for employees who cause PR nightmares. We're thinking, of course, of Princess Margaret's lover Peter Townsend who conveniently wound up with a job in British Embassy in Brussels (via Town and Country).