B&Q IT chief Roderick Angwin has left the business, as parent company Kingfisher reorganises its IT bosses.
The DIY giant has unified the roles of Kingfisher group IT director, formerly held by Paul Worthington, and B&Q systems director, Angwin's post.
The move comes as Kingfisher seeks to move B&Q's IT functions closer to the main group, a spokesman said. Worthington will now join the board at B&Q.
Angwin has been at B&Q since 2001, following stints at Meyer Saint Gerbain and Safeway.
He started his career at British Telecom before it was privatised.
He is a member of a powerful group of former employees at confectionery giant Mars, which includes past and present IT heads at Tesco, WHSmith and Safeway.
Worthington, from Lancashire, joined Woolworths in 1998. In 2000, he become chief information officer at newly launched e-Kingfisher, the retail group's Internet arm.
From 2002 until last year he managed the IT integration of Castorama and B&Q, before becoming Kingfisher's group IT chief.