There's been a change at the top at Walgreen Boots Alliance, with global CIO Tim Theriault stepping down today (1 June) citing personal reasons.

Anthony Roberts, who had served as senior vice president, international CIO, is his replacement, assuming the role of senior vice president, global CIO. Roberts led the transformation of IT across Alliance Boots and most recently co-led the integration office in preparation for the merger of Walgreens and Alliance Boots.

Theriault will continue to serve as a consultant to the company and as a senior advisor to executive vice chairman and acting CEO Stefano Pessina on a range of issues, including cyber security.

Commenting on the change, Pessina said: "Tim has played a critically important role over the past six years leading Walgreens IT transformation, and advancing and integrating the Walgreens Boots Alliance technology teams and infrastructure since the merger of Walgreens and Alliance Boots last December.

"We are grateful for all that Tim has done and for continuing as a consultant and a senior advisor to me as we pursue new global frontiers in IT to serve customers, patients and partners."