Allen & Overy (A&O) chief technology officer (CTO) Ian Storer has resigned to join Swiss bank UBS, after more than a decade at the magic circle firm.

Storer will join UBS on 7 May as architect for legal, reporting to group chief technology officer Julian Hingorani.

He joined A&O as a solution architect in 2007 and held various positions before being appointed deputy CTO in December 2012. He became CTO in August the following year.

In a statement, A&O said: "Ian has decided to leave Allen & Overy and will be leaving at the end of April. We would like to thank him for the contribution he has made during his time at Allen & Overy and wish him all the best for the future."

The firm declined to comment on whether a replacement for the role has been appointed yet.

Before joining A&O, Storer worked for legacy Autonomy for nearly three years until 2003 as technology solutions director. The company, now called HP Autonomy, was co-founded by billionaire entrepreneur Mike Lynch. It was acquired by Hewlett-Packard in 2011 before being sold to UK software company Micro Focus last year.

Earlier this year, Linklaters appointed director of technology Matt Peers as chief operating officer, replacing Peter Hickman who remains global chief financial officer. Peers joined Linklaters as chief information officer (CIO) in 2015 from big four accountant Deloitte, where he was CIO for UK and Switzerland. As part of his new role, he joins the firm's executive committee.