Rein Willems (born 26 August 1945, in Geleen) was President of Shell Nederland from 2003–2007.
Since 1969, he has held a number of positions at Shell, with postings in Singapore, Australia, the UK, the Philippines and Brazil.
In addition, he was a member of the Executive Committee and the Environmental Committee of the Employers Association VNO-NCW and the Innovation Platform.
He is Chairman of the Supervisory Board of Koninklijke Joh.