6 May 2021 OCEANAGOLD STRENGTHENS BOARD OF DIRECTORS WITH NEW ADDITIONS (BRISBANE) OceanaGold Corporation (TSX: OGC) (ASX: OGC) (the “Company”) appoints Mr. Michael (Mick) James McMullen and Mr. Paul Benson as Non-Executive Directors to the Company Board of Directors (the “Board”). Ian Reid, Non-Executive Chairman of OceanaGold said, “On behalf of the Board of Directors, I am delighted to announce the appointment of two highly reputable and successful mining professionals who have achieved significant success over their collective 70 years in the industry. We believe with their track record and experience collectively with the Board will make significant contributions to the success of the Company. OceanaGold has high-quality assets and robust organic growth projects that are designed to deliver significant value for shareholders. With the addition of both Mick and Paul, we are well placed to turn the corner on the business and re-establish ourselves as one of the premier gold mining companies in the industry.” Mr. McMullen is a geologist with nearly 30 years of experience across Australia, North and South America, Asia including the Philippines, Africa and Europe in all phases of mining development including exploration, development, operations and financing. He has broad based mining experience with precious and base metals including gold and copper from both surface mining and underground operations. While serving as Chief Executive Officer at Detour Gold and prior to that as President and Chief Executive Officer of Stillwater Mining Company, he delivered significant value to shareholders through operational improvements and optimising operations for cash flows. Mr. McMullen currently serves as an Executive Director of Venture X Resources Limited (and subject to a shareholder vote in early June will transition to a Non-Executive role) and Senior Advisor to Black Mountain Metals. He holds a Bachelor of Science degree in Geology from Newcastle University. Mr. Benson is a mining engineer with over 35 years of experience across Australia, North and South America, Asia and Europe in mine development, operations, and capital markets. He has broad based experience with precious and base metals including gold, silver and copper from both surface and underground operations. More recently, Mr. Benson established SSR Mining as one of the premier gold and silver companies as Chief Executive Officer prior to its merger with Alacer Gold. Prior to this, Mr. Benson served as Chief Executive Officer at Troy Resources with principal assets in South America and prior to this in various senior management and operational roles at BHP Billiton, Rio Tinto and RGC. He graduated from the University of Sydney with Bachelor of Engineering degree in Mining Engineering and a Bachelor of Science Degree in Geology and Exploration Geophysics and a Master’s Degree in Management from the London Business School. 2 Messrs McMullen and Benson will be included in the Company’s Information Circular for the upcoming Annual General and Special Meeting scheduled for release later this month. - ENDS - Authorised for release to market by OceanaGold Corporate Company Secretary, Liang Tang. For further information please contact: Investor Relations Media Relations Allysa Howell Tel: +1 720 484 1147 IR@oceanagold.com Melissa Bowerman Tel: +61 407 783 270 firstname.lastname@example.org www.oceanagold.com | Twitter: @OceanaGold About OceanaGold OceanaGold is a multinational gold producer committed to the highest standards of technical, environmental and social performance. For 30 years, we have been contributing to excellence in our industry by delivering sustainable environmental and social outcomes for our communities, and strong returns for our shareholders. Our global exploration, development, and operating experience has created a significant pipeline of organic growth opportunities and a portfolio of established operating assets including Didipio Mine in the Philippines; Macraes and Waihi operations in New Zealand; and Haile Gold Mine in the United States of America. Cautionary Statement for Public Release Certain information contained in this public release may be deemed “forward-looking” within the meaning of applicable securities laws. Forward-looking statements and information relate to future performance and reflect the Company’s expectations regarding the generation of free cash flow, achievement of guidance, execution of business strategy, future growth, future production, estimated costs, results of operations, business prospects and opportunities of OceanaGold Corporation and its related subsidiaries. Any statements that express or involve discussions with respect to predictions, expectations, beliefs, plans, projections, objectives, assumptions or future events or performance (often, but not always, using words or phrases such as "expects" or "does not expect", "is expected", "anticipates" or "does not anticipate", "plans", "estimates" or "intends", or stating that certain actions, events or results "may", "could", "would", "might" or "will" be taken, occur or be achieved) are not statements of historical fact and may be forward-looking statements. Forward-looking statements are subject to a variety of risks and uncertainties which could cause actual events or results to differ materially from those expressed in the forward-looking statements and information. They include, among others, the outbreak of an 3 infectious disease, the accuracy of mineral reserve and resource estimates and related assumptions, inherent operating risks and those risk factors identified in the Company’s most recent Annual Information Form prepared and filed with securities regulators which is available on SEDAR at www.sedar.com under the Company’s name. There are no assurances the Company can fulfil forward-looking statements and information. Such forwardlooking statements and information are only predictions based on current information available to management as of the date that such predictions are made; actual events or results may differ materially as a result of risks facing the Company, some of which are beyond the Company's control. Although the Company believes that any forward-looking statements and information contained in this press release is based on reasonable assumptions, readers cannot be assured that actual outcomes or results will be consistent with such statements. Accordingly, readers should not place undue reliance on forward-looking statements and information. The Company expressly disclaims any intention or obligation to update or revise any forward-looking statements and information, whether as a result of new information, events or otherwise, except as required by applicable securities laws. The information contained in this release is not investment or financial product advice.