Syneos Health Tapped PRA Health Sciences' Colin Shannon as the CEO Succeeding Michelle Keefe

On October 3, 2023, Syneos Health, Inc. (the “Company”) publicly announced that Colin Shannon has been appointed Chief Executive Officer of the Company, effective immediately. Mr. Shannon succeeds Michelle Keefe, who will continue her tenure with the Company as a key member of the Executive Leadership Team. Mr. Shannon and Ms. Keefe will remain on the Board of Directors of the Company.

Mr. Shannon does not have any family relationships with any director or executive officer of the Company. In addition, there have been no transactions directly or indirectly involving Mr. Shannon that would be required to be disclosed pursuant to Item 404(a) of Regulation S-K under the Securities Exchange Act of 1934, as amended.