The candidate must be prepared to travel to Windsor, Sandringham, Balmoral and the Palace of Holyroodhouse in Edinburgh when required.
Earning £14,200 a year, the General Catering Assistant (Wash Up) will work in the staff restaurant of the Royal Household but also wash other royal dishes.
The applicant "must be willing to work away from London for up to three months of the year", according to the advert on the royal website.
"You will join the team responsible for maintaining the cleanliness of the staff restaurant, wash-up areas and equipment in accordance with the Health and Hygiene Regulations to ensure the smooth operation of the staff restaurant."
Candidates should be "punctual, reliable, able to work well in a team and have a flexible and willing attitude".
The job offers accommodation and the application deadline is January 15.