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:
Procedures at Noble's Hospital cancelled due to 'significant pressures'
Manx Care experiencing 'very high demand'
Medical Society calls for 'statutory elected body' as chief exec exits Manx Care
IOMMS says it's 'essential that the momentum for fundamental reform is maintained'
Cope out: How did we get here?
Manx Care's five-year history broken down
Teresa Cope: Reaction as Manx Care CEO steps down
What comes next for the Island's healthcare provider?