Kate McMahon > Edmonds Marshall McMahon > London, England > Lawyer Profile

Edmonds Marshall McMahon
Kate McMahon photo

Work Department

Private prosecutions/white-collar crime.


Kate is a specialist, dual-qualified prosecutor. Prior to co-founding Edmonds Marshall McMahon, Kate prosecuted for the Serious Fraud Office (SFO) where she worked as a senior lawyer on some of the UK’s largest criminal prosecutions, including the “Innospec” case. This was the first global settlement in the UK and involved systemic corruption by a UK/USA company in Iraq and Indonesia. The case resulted in a US$12.7 million fine in the UK and a US$14.1 million fine in the USA and successful prosecutions of the Company Directors and employees. Kate now specialises in cases involving serious fraud, serious and violent crime, international crime and perverting the course of justice.

Kate is known for her incisive analysis and strategic vision, having had conduct of large fraud, corruption and trademark cases. She is highly regarded by her clients and has a reputation for being extremely determined and driven in all her cases. She has been described as an “outstanding prosecutor” who provides “intellectual leadership”. She is praised for her “high intelligence, tactical acumen and great client care skills.”


Senior caseworker SRA, London 2005-06; public prosecutor Department of Public Prosecutions, Brisbane 2007-08; senior prosecution lawyer GLS UK, London 2008-12; partner Edmonds, Marshall, McMahon 2012-todate.


The Law Society; Proceeds of Crime Lawyers Association (POCLA); Fraud Lawyers Association (FLA); The Female Fraud Forum; The Fraud Women’s Network; Fraud Advisory Panel; AIJA (International Association of Young Lawyers).


Loerto College 1993-97; Queensland University of Technology 1998-2004.

Lawyer Rankings

London > Crime, fraud and licensing > Fraud: white-collar crime (advice to individuals)

Specialist player Edmonds Marshall McMahon is dedicated to private prosecution work. Within this niche it has experience across a wide range of private prosecutions, including those allegedly guilty of fraud, financial crime and corporate dishonesty. Its team is made up of investigators, barristers and solicitors and it advises clients in the oil and gas, property investment, personal investment and charity sectors. The team is headed by the ‘clever and driven‘ Kate McMahon, the ‘diligent and knowledgeable‘ Andrew Marshall and the ‘unwavering‘ Tamlyn Edmonds. McMahon handles serious fraud, international crime and perverting the course of justice matters. Marshall is recommended major fraud prosecutions and regulatory matters. Edmonds focuses on serious fraud, cyber-crime, asset recovery, international fraud, and intellectual property crime.