Deputy Assistant Commissioners Barbara Gray and Matt Twist will join the Met’s Management Board after being appointed as Assistant Commissioners.

DAC Gray will become the Assistant Commissioner for Professionalism while DAC Twist will become the Assistant Commissioner for Met Operations on a long-term temporary basis.

Professor Lawrence Sherman will also join the Met as its first Chief Scientific Officer (CSO) and advisor to the Board. Professor Sherman will provide independent and expert advice on science, technology and research methods to inform decision making across the Met.

The Management Board will play a key role in taking forward the ambitious reforms set out by Commissioner Sir Mark Rowley as the Met works to deliver more trust, less crime and high standards for Londoners.

Assistant Commissioner Louisa Rolfe will move from her current role leading Met Operations to take on responsibility for Frontline Policing.

Assistant Commissioner Matt Jukes will continue as Assistant Commissioner for Specialist Operations (ACSO).

Met Police Commissioner Sir Mark Rowley said: “I’m excited to make these senior appointments to my new leadership team, and look forward to working with them all in their new roles. We are finalising the details of their portfolios and wider Management Board roles, and will be able to provide a fuller update in the next few weeks.”

The Chief Scientific Officer will start on 1 October, and the Assistant Commissioner appointments will start from 10 October.

Biographical information:

DAC Barbara Gray joined the police in Northern Ireland in 1989. She has considerable operational experience as a nationally qualified Public Order Commander, Firearms Commander and Multi-Agency Gold Incident Commander. She served in many areas across Northern Ireland and was the Ops manager in North and West Belfast during a time of the most contentious and serious disorder experienced for many years.

DAC Gray became the first woman to be appointed as Commander in Specialist Operations Branch and went on to become the first female Assistant Chief Constable in the Police Service of Northern Ireland’s Operational Support Department and then the Crime Operations Department.

She joined the Met In April 2021 as Deputy Assistant Commissioner and has pan-London responsibility for public order, specialist firearms, TSG, roads policing, criminal justice, resourcing, civil contingencies, contact centres and custody.

DAC Matt Twist joined the Met in 1996 as a Police Constable assigned to Kensington and Chelsea. He has spent the vast majority of his service in operational roles including emergency response, Special Branch and firearms.

DAC Twist served in Surrey Police for three years as a Chief Superintendent between 2013 and 2016 in roles including Head of Investigations, Divisional Commander and Temporary Assistant Chief Constable.

He returned to the Met in May 2016 as Commander for Firearms and the Taskforce. He was promoted to Deputy Assistant Commissioner in April 2018 and has performed a number of important roles including serving as the Met’s Gold Commander for the response to Covid-19.

Professor Lawrence Sherman began his career in police research in the New York City Police Department in 1971.

Since then, he has conducted or designed field research and experiments in over 30 police agencies across five continents, including the Metropolitan Police in London and the Australian Federal Police.

His research on policing has received honours from eight universities and seven scientific societies. He has served as President of both the American and International Societies of Criminology.

More recently, Professor Sherman was the Director of the Cambridge Centre for Evidence-Based Policing and the Wolfson Professor of Criminology Emeritus at the University of Cambridge.