New deputy chief constable arrives in Hertfordshire

Mr Mariner, who has more than 28 years’ policing experience, said: “I am delighted to be joining Hertfordshire – a great organisation with a reputation of being an innovative, friendly and victim-focused constabulary.

“I have visited on a number of occasions over the last few months preparing for my arrival and have been continually impressed by the people I have met, who are passionate and professional and come to work to help people.”

Hertfordshire Constabulary Chief Constable Andy Prophet said: “Andy comes in as a key member of the chief officer team and I know he shares our vision of becoming an outstanding force serving the people of Hertfordshire.

“He brings with him a wealth of policing experience, dedication and energy with a focus on catching criminals, protecting the vulnerable and driving down crime.”

Mr Mariner joined the Metropolitan Police Service in 1997, working in a variety of policing roles.

During his two decades in the capital, he was a lead in many major public events, including the Notting Hill Carnival and New Year’s Eve celebrations, together with a host of Premier League football matches.

In 2012, he led the Olympic Torch security operation working with police forces across the UK to ensure the torch’s safe arrival in London.

Mr Mariner joined Essex Police in 2016 as a superintendent and continued his progression through the ranks to assistant chief constable , where he was responsible for local policing in Essex and leading its approach to the new national policing guarantee. He also led on the force’s approach to hate crime and engagement with children and young people.

He is a specialist firearms commander, public order and CBRN(e) commander. Mr Mariner is also the National Police Chiefs’ Council lead for stop and search.

He lives in west Essex with his wife and has five children. In his spare time, he enjoys doing regular gym classes and walking his dog with his family.