The Board of Directors of Xtant Medical Holdings, Inc. appointed Michael Mainelli as Interim Chief Executive Officer, replacing Carl D. O'Connell, effective October 12, 2018. Mr. Mainelli, has served as a member of the Board of Directors of the Company since February 2018. Mr. Mainelli was initially elected to the Board in connection with the company's restructuring in February 2018. Mr. Mainelli has worked in the medical device industry for over 25 years, serving the diagnostic imaging, surgical, and orthopedic markets. He has extensive international experience having led operations in Japan, France, the United Kingdom and Israel. From March 2013 to May 2016, Mr. Mainelli served as President and Chief Executive Officer of Stanmore Implants Worldwide, LTD, a UK based specialty orthopaedics company, and led the sale of the company to Stryker Corporation. From 2008 to 2011, Mr. Mainelli was the President and Chief Executive Officer of Active Implants Corporation, an early stage company developing an innovative meniscal implant. From 2005 to 2006, he was the Group President of the Medical Device Segment of Intermagnetics General Corporation before the company was acquired by Royal Philips. Mr. Mainelli was with Stryker Corporation serving in the positions of VP-Corporate Development, Assistant to the Chairman, President-Stryker Japan and President-Stryker Spine. Prior to Stryker, he was employed by General Electric in various management roles. He has previously served on the board of directors of Orthofix International N.V. He currently serves on the board of directors of Autocam Medical Devices, LLC.