Shearman & Sterling is representing longstanding client The Dow Chemical Company in its joint venture with Saudi Arabian Oil Company (Saudi Aramco) to build a $20 billion petrochemical plant at the Persian Gulf port of Jubail.

The project—Sadara Chemical Company—will be one of the world’s largest integrated chemical facilities and the largest ever built in one single phase.

Nick Buckworth, one of the partners that led the team advising Dow, said “This announcement is the culmination of many years of hard work for client and adviser alike and we are honored to have played our part. Saudia Arabia is a vitally important market for Shearman & Sterling, and our involvement with Sadara is critical to our success there.”

The Shearman & Sterling team of lawyers in the firm’s London and Abu Dhabi offices was led by project development and finance partners Nick Buckworth and Ben Shorten, along with partners Iain Elder and Brian Clayton. They were assisted by counsel Gregor Page and associates Robin Bayley, Dan Feldman, Natasha Kirby, Suzanne Szczetnikowicz, Gareth Hodder, Laura Khong, Brendan Hundt and Christy Wong.