Shell is seeking a head of media and communications and a director of policy and issues as a result of Jacobi's decision. She has overseen 900 comms staff in 140 countries during a turbulent spell including the scandal over the exaggeration of oil reserves .
Jacobi is to take up a part-time advisory role as civil service commissioner.
She married at the start of the year and wants to remain in the UK, said press officer Bianca Ruakere.
Shell Transport and Trading, the UK arm of the business, is merging with Royal Dutch Petroleum to become Royal Dutch Shell. It remains a UK-listed company.
A newly created media and comms department based in The Hague will incorporate the 15-strong Dutch press office, plus 45 staff relocated from the UK. The eight-strong UK press office, led by head of group media relations Stuart Bruseth, and the IR department remain in the UK.