Gibson Dunn & Crutcher has hired a new white collar crime and investigations lawyer in Washington DC.

Zainab Ahmad joins the firm having previously served as a Senior Assistant Special Counsel in Special Counsel Robert S. Mueller's Office. She also acted as a prosector and trial lawyer in the Department of Justice.

Ahmad joins the firm's white collar defense and investigations practice and also acts on regulatory and civil litigation challenges, such as matters involving cybercrime, corruption, anti-money laundering, sanctions and FCPA issues.

According to the firm's press release, during her tenure at the DoJ, she prosecuted and supervised some of the most complex international terrorism investigations in the United States, focusing on al-Qaeda, ISIS and attacks against US military personnel and US diplomats. In pursuit of these extraterritorial national security investigations, she worked closely with the FBI, US intelligence community, the Department of State and the Department of Defense, and she traveled to Europe, the Middle East and West Africa seeking evidence, testimony and extradition assurances.