The industry trade body announced it was conducting a review in January and has been working with external advisers to benchmark its structure against comparable organisations.
The CIPR has engaged recruitment firm VMA Group to lead the search for the new CEO.
New roles have also been created in place of the deputy director general and assistant director general roles.
Deputy director general and most recently acting director general Ann Mealor will remain at the Institute as interim CEO until the end of September.
James Petre, assistant director general, qualifications and education, has been appointed to the new post of director of professional development and membership, effective from 1 July.
Assistant director general, business development and events, Elspeth Graham has been appointed to the new post of director of commercial.
A new post of director of policy and communications has also been created and will be recruited to drive the Institute's policy activities.
As part of the changes, assistant director general, office services, Richard George will be leaving the CIPR at the end of July.
The second phase of the review, due for completion by the end of 2010, will focus on putting in place new processes to deliver operational efficiencies across the organisation.
CIPR president Jay O'Connor said of the review: ‘2010 is a year of change for the Institute following the challenges of 2009. As a result of the changes we are making and will make, we will deliver a re-focused organisation in tune with the profession, an Institute that is open, collaborative and intent on delivering the best guidance and professional development opportunities.'
She added: ‘The changes will take time, with initiatives delivered over this year and next, but progress is already evident in the launch of our new website and our new policy activities, including the social media panel, our specialist social media measurement group, a new diploma in public affairs, the launch of online Continuous Professional Development, and of course in our awards and regional activities, which continue to go from strength to strength.'