Barclays' head of M&A legal Khasruz Zaman is set to become the latest in a string lawyers to leave Barclays in-house legal team this year as he moves to Simmons & Simmons.

Zaman, who has worked for Barclays for over nine years, will begin his new role in September.

He previously worked as a solicitor for over seven years at Slaughter and May until 2003 before joining legacy Lovells for two years.

Mark Curtis, head of Simmons' international corporate and commercial group, said Zaman's hire marked "continued development and investment" in the firm's M&A offering and would strengthen its financial institutions sector expertise.

During his time at Barclays, Zaman was involved in several major acquisitions including that of Standard Life Bank in 2009 and the bank's $1.75bn acquisition of the North American investment-banking business of Lehman Brothers after it went bankrupt in 2008. He was also involved the bank's proposed merger with ABN Amro in 2007.

Zaman's departure is the latest in a string of exits from the bank's in-house team this year.

In January Barclays was announced that GC for corporate and investment banking Judith Shepherd was stepping down from her post.

Since then, there have been at least another five senior in-house departures, including managing director of litigation and investigations Jonathan Peddie, head of litigation Dave Hart, head of corporate banking legal Joanna Carver, investment bank EMEA general counsel Erica Handling and deputy group general counsel Michael Shaw.

The exits come amid a wider restructuring at the bank, which is aiming to cut 19,000 jobs by 2016.

Meanwhile Ashurst has re-hired former partner Eric Stuart from Jones Day to join its London based US securities team.

Stuart was a partner at Ashurst for eight years before moving to Jones Day in 2011 as part of trio of hires from Ashurst including fellow US securities partners Daniel Bushner and Marie Elena Angulo.

Ashurst's global head of corporate Simon Beddow said: "Eric's experience will help to boost the US securities team in the UK as well as across Europe and emerging markets in Eastern Europe and Africa."