Mariella Orelli has acted as counsel in more than 50 international commercial arbitration cases, including as lead counsel in a billion-dollar investment dispute in the Middle East and in a billion-dollar post-M&A dispute in the financial industry. She also regularly represents clients in court litigation, including in asset-tracing and enforcement proceedings. She has been involved in various landmark cases, such as the first ever successful application for the revision of an arbitral award. While her focus is on energy matters, she is familiar with a number of industries, including banking & insurance, construction, pharmaceuticals, agency and distributions and has worked on a wide range of M&A disputes.

“She is wonderful: highly responsive, goes into detail and gets to the point – a real pleasure to work with.” (Chambers Global 2016), “… incredibly quick and responsive” (Legal500 2016), “… thoughtful in addressing the delicate issues of the case…”, “particularly brilliant during hearings” (Chambers 2018); “goes deep into the details of the matter” (Chambers Energy); “impressively bright and impressively tenacious” (Chambers Global 2019).