Formerly the deputy chief, 49 year old Gary Roberts becomes the first Island officer to take the helm.
Mr Roberts started as a constable in Douglas 28 years ago and rose through the ranks.
His predecessor Mike Langdon fostered a neighbourhood policing approach which has seen crime in the Island fall to the lowest level of any British Isles police force.
Chief Constable Roberts is committed to sustaining that policy - if funds allow:
Red weather warning issued for coastal overtopping
It will come into effect on Tuesday at 2:30pm
Motorists' post about 'raised metal' raises awareness for other drivers
Claire Losh had two flat tyres
Emergency road closure extended following landslip
Inspections have been taking place this morning
20mph drop-in session in the south today
It's part of the Department of Infrastructure's ongoing consultation