118 civilian jobs are due to go by the end of the summer at Dyfed Powys Police.
The force, which employs more than 800 staff, says the restructuring comes as the UK Government aims to reduce its budget.
The commissioner's office says no police officers will be made redundant or PCSOs. The Unison union is being consulted.
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A group of ex-servicemen have become the first people to climb Pen y Fan in the Brecon Beacons for 24 hours non-stop.
Thousands of athletes are in Tenby for the competition which consists of a two mile swim, a 112 mile cycle ride and a marathon.