Orrick has hired Olswang's Paris managing partner and corporate head Guillaume Kessler ahead of the UK firm's three-way merger with Nabarro and CMS Cameron McKenna.

Kessler, who joined the firm as a partner in Paris on Monday, is the latest in a series of recruits to join the US firm's Paris arm.

His departure from Olswang comes after he joined the firm in 2011, having previously been a partner at independent French law firm Brandford-Griffith & Associes. Before that, he was a lawyer at Freshfields Bruckhaus Deringer and Clifford Chance.

Olswang's merger with Nabarro and CMS UK will go live on 1 May, with the firm to be known under the CMS banner internationally and as CMS Cameron McKenna Olswang in the UK.

Legal Week reported in November that Olswang's Paris team had relocated to temporary office premises ahead of the merger, amid ongoing uncertainty about whether the firm's continental European lawyers will join the merged firm.

Olswang signed a short-term Paris lease with Regus, a company that provides flexible and temporary workspaces.

At this point, it is unclear what is happening to Olswang's other lawyers in Paris. According to the firm's website, it has four partners excluding Kessler.

Shortly after the merger talks were announced last September, Legal Week reported that partners in Olswang's continental Europe offices were considering alternatives to joining the merged firm.

Legal Week reported last year that four Freshfield Bruckhaus Deringer Paris partners were in talks to join Orrick in the French capital. The partners – corporate partner Patrick Tardivy, finance partners Emmanuel Ringeval and Herve Touraine, and Paris employment head Emmanuel Benard – all joined Orrick last year alongside Freshfields Paris finance counsel Olivier Bernard.