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Gibson Dunn continues lateral hiring spree with hire of A&O arbitration partner Jeffrey Sullivan

Gibson, Dunn & Crutcher has added to its growing European offering with the appointment of London-based arbitration partner Jeffrey Sullivan from Allen & Overy (A&O).

Described by the Legal 500 as a leading individual in public international law, Sullivan also specialises in both commercial and investment treaty arbitration. His practice has a particular focus on clients in energy, infrastructure and private equity sectors.

Sullivan joined A&O from Foley & Lardner, where he was based in the US firm’s Washington DC office, in 2006. He was made up to partner at the Magic Circle firm in 2013.

Gibson Dunn’s international arbitration practice group co-head Penny Madden QC told Legal Business: ‘We are very busy, particularly in the investment treaty space, and the hire of Jeff is the perfect fit for us. He has a thriving practice, we have a thriving practice and the synergies between the two look to be very strong. We are growing in this area.’

Sullivan’s appointment is the latest in a string of notable European appointments for Gibson Dunn, with the firm taking on a group of five lawyers from Ashurst’s Paris office led by litigation and restructuring partner Jean-Pierre Farges in June.

He was joined by fellow disputes partners Pierre-Emmanuel Fender and Eric Bouffard, corporate partner Bertrand Delaunay and finance counsel Amanda Bevan, who will be made up to partner in the move.

This January, Gibson Dunn’s Paris office brought in a team of four from A&O. Technology and digital transactions partner Ahmed Baladi joined alongside counsel Vera Lukic and two associates.

The US firm also took on Herbert Smith Freehill’s global energy co-head Anna Howell last month, bolstering its fast-growing global energy practice after launching a new Houston office this May.