Raymond Sancroft-Baker supervises Christie's jewellery sales in Amsterdam, Geneva, London, Paris and Rome. He began his career at Christie's in the Coins & Medals Department, where he conducted sales in the United States and in Europe.

He took charge of the Jewellery Department in London in 1988.
Mr. Sancroft-Baker organized the sale of the historic 32-carat pink Agra diamond in 1990 that sold for a world auction record price of $6.9 million; the same auction saw the largest ever total for a London jewellery sale of $22 million, a record that stood for 18 years.

He created the first theme auction in 1992 entirely devoted to jewellery, clocks and objects by Cartier. He has been instrumental in setting Christie's disclosure policy concerning treatments and artificial enhancements of jewellery to be sold. Raymond Sancroft-Baker is a Fellow of the Gemmological Association (FGA).