Excerpt from the Federal Law Clerk Information System website:
Duties of Federal Law Clerks
The duties and functions of a federal judicial law clerk are determined by the employing judge. In most chambers, law clerks concentrate on legal research and writing. Typically, the broad range of duties assigned to a law clerk includes conducting legal research, preparing bench memos, drafting orders and opinions, proofreading the judge's orders and opinions, verifying citations, communicating with counsel regarding case management and procedural requirements, and assisting the judge during courtroom proceedings. Some judges also may assign maintaining the chambers library, and other administrative duties to the law clerk. Because there are a myriad of tasks that may be assigned to a law clerk, the Federal Law Clerk Information System permits a judge to identify any particular duties that are required in the position announcement.
Judicial law clerks also are expected to work cooperatively with chambers staff and court personnel. The employing judge must be confident in the law clerk's professionalism in interacting with counsel, litigants and the public. A law clerk is bound by the ethical standards established by the judge and the Code of Conduct for Judicial Employees.
For those interested in becoming a law clerk for a federal judge, please go to the Federal Law Clerk Information System's web site at https://lawclerks.ao.uscourts.gov. Applicants for positions as law clerks or legal interns to a Federal Judge should direct their letter, including resume, directly to the judge's chambers. Law clerks are typically hired for one or two year terms.