US law firms O'Melveny & Myers and Squire Sanders & Dempsey have overhauled their London management.

O'Melveny has named investment funds partner Solomon Wifa as the new head of its City office, with Wifa replacing funds partner John Daghlian, who is stepping down to focus on full-time fee earning.

Wifa joined O'Melveny in 2004 as an associate from SJ Berwin and, in 2007, became one of the first UK-qualified lawyers to be made up to partner at the firm's City arm.

Daghlian has headed the London office since 2007, having joined the firm in 2004 from SJ Berwin. At that point he was one of three corporate partners brought in to relaunch the office alongside Matthew Hudson and private equity partner Andrew Carpenter, who joined from DLA Piper.

Commenting on his appointment, Wifa told Legal Week: "Although the firm has a broad practice base in London, we are not trying to be a full-service provider and will continue to be a more focused operation, principally around M&A, private equity, finance and international arbitration."

Separately, it has emerged that Squire Sanders' former London head, Andrew Visintin, has left the firm. It is unclear where Visintin, who joined the US outfit at the beginning of 2006, has gone, but he is believed to have taken a non-legal role with a client.

US telecoms partner Joe Markoski, who relocated to London at the beginning of 2009, has been appointed as interim managing partner with a remit to build out the office. London-qualified corporate partner Andrew Wilkinson will work alongside Markoski as the administrative partner for the office.

Markoski, who previously headed up the firm's Washington DC office, also spent a number of years in London in the 1990s.