John H Hemann

Practice Areas

John Hemann is a prominent trial lawyer with more than 25 years of experience overseeing high-profile white collar, criminal, anti-corruption, FCPA, national security, trade secret, cybersecurity and antitrust cases and prosecutions in the public and private sectors. Most recently, John served as chief of the special prosecutions and national security unit and deputy chief of the criminal division at the US Attorney’s Office for the Northern District of California. John has tried more than 30 cases, served on the high-profile Enron task force and has handled SEC, DOJ and FCPA investigations, insider trading cases, securities litigation and antitrust matters.

As a member of the national security unit, chief of the special prosecutions and national security unit and deputy chief of the criminal division at the US Attorney’s Office, John prosecuted some of the most prominent cases in the country. Recent notable cases include computer intrusion cases arising from the hacking of US technology companies such as Yahoo and prosecutions of foreign agents illegally working within the US. John successfully handled the first criminal Economic Espionage Act jury trial, a two-month proceeding that resulted in convictions for economic espionage, bank fraud, tax fraud and obstruction of justice. In his career with the US Department of Justice, he also served on the McKesson task force and handled many high-profile fraud matters, including complex securities fraud and insider trading trials. John has also investigated, charged and tried corrupt police officers.

Given his private and public sector experience, John has a deep understanding of white collar crimes, government and private investigations, high-stakes trials and trial strategy, state and federal criminal statutes and related regulations, as well as the ability to negotiate and obtain successful outcomes in complex and challenging circumstances. John has handled complex crisis situations when a confluence of actors – government investigators, regulators, employees, shareholders, customers, reporters and others – aggressively compete for attention and limited resources. As a result, clients turn to John when reputations are at risk, public scrutiny is at its highest and bet-the-company scenarios are at hand, knowing he can guide them through the toughest of times.

During his time with the US Attorney’s Office, John served as the national security cyber coordinator and the National Security/Anti-Terrorism Advisory Council coordinator. He has received numerous awards for his work in the office, including the Attorney General’s Award for Excellence in Furthering the Interests of US National Security, the FBI Director’s Award for Outstanding Counterintelligence Investigation and two US Department of Justice Director’s Awards.