On April 12, 2019, Zion Oil and Gas, Inc. (the "Company") was advised by Dustin L. Guinn that he is resigning from his position as Chief Executive officer, President and Vice Chairman of the Board of Directors (the "Board") of the Company, effective immediately. Mr. Guinn's resignation is not the result of any disagreement with the Company on any matter relating to the Company's operations, policies or practices. In order to streamline the organizational structure of the Company with the departure of Mr. Guinn, on April 12, 2019, the Company's Board appointed John M. Brown, the Company Executive Chairman of the Board, as the Chief Executive Officer.

John M. Brown, age 79, is the founder of Zion Oil & Gas and has been a director and Chairman of the Board of Directors of Zion since its organization in April 2000. Mr. Brown was appointed Executive Chairman in January 2010. Mr. Brown will continue to serve as the Executive Chairman.

Mr. Brown has extensive management, marketing and sales experience, having held senior management positions in two Fortune 100 companies. On April 12, 2019, the Company appointed William H. Avery, currently Executive Vice-President, General Counsel and a non-employee director on the Company's Board, as President of the Company. William H. Avery, age 71, was appointed to the Board as a non-employee director, effective September 1, 2013.

Robert W.A. Dunn has joined the Company as Director of Operations, effective May 1, 2019. Mr. Dunn's impressive resume includes over 26 years of senior management and field operations focusing on technologically driven seismic acquisition across the globe.