アメリカ法
Cuéllar was elected to the American Law Institute (ALI) in 2008 and was elected to the ALI Council in 2014. He has worked on several ALI projects, including Model Penal Code: Sentencing, Principles of Government Ethics, and Restatement Fourth, The Foreign Relations Law of the United States. In July 2010, President Barack Obama appointed Cuéllar to the Council of the nonpartisan U.S. Administrative Conference, an independent agency dedicated to improving the efficiency and fairness of federal administrative procedures. From 2010 until his appointment to the judiciary in 2015, he also served on the Board of Directors of The Constitution Project, a bipartisan non-profit organization that builds consensus on constitutional issues affecting the rule of law and criminal justice.