Jarman joins the force as head of corporate information at the end of March from Bedfordshire and Hertfordshire Strategic Health Authority, where he is head of communications and public involvement.
The previous permanent comms head at the force was John Deal, who left last February. The comms function in the interim has been headed by former Cambridge Evening News deputy editor Peter Wells.
One of Jarman's key tasks at Cambridgeshire will be to oversee the force's ongoing communications and media relations regarding the tragic deaths of Holly Wells and Jessica Chapman.
He added that he wanted to look back at how the 'communications process' has been handled so far to, 'see what worked well and what worked less well.'
He declined to comment further as to what if any other aspects of the force's communications function would be reviewed.
Jarman will lead the 11-strong comms team, which covers the TV unit, press office as well as internal and online communications. He reports to director of executive support Janet Dalrymple.
Last August the PR function was bolstered further with the appointment of Matt Tapp as a consultant to work on communications relating to the Soham tragedy.
Tapp had been the force's head of corporate information until April 2001 when he left to join media training firm Talking Heads as a partner (PRWeek, 20 April).
Jarman joined Beds and Harts SHA in June last year. He was previously head of communications at Bedfordshire County Council and later worked for Hyder Business Services, the firm that took over the running of Bedfordshire County Council's PR team.