Major Drilling Announces Publication of Sustainability Report

MONCTON, June 26, 2023 - Major Drilling Group International Inc. ("Major Drilling" or the "Company") (TSX: MDI), a leading provider of specialized drilling services to the mining sector, today published its Sustainability Report covering the reporting period of calendar 2022.

"We're proud to announce the publication of our second annual Sustainability Report, showcasing Major Drilling's continued dedication to sustainable practices and responsible operations", said Denis Larocque, President and CEO of Major Drilling. "As a leading provider of drilling services for the mining sector, Major Drilling recognizes the importance of minimizing its environmental impact while positively contributing to the communities in which we operate. This Sustainability Report details our progress on key sustainability areas, including environmental performance, employee well-being, community engagement, and ethical business practices."

2022 Sustainability Report highlights include:

• 12% intensity reduction in scope 1 & 2 Greenhouse Gas ("GHG") emissions.
• Embarked on a global assessment of GHG emissions and will be working on a roadmap to explore and identify emissions reduction opportunities.
• Deployment of Solid Removal Centrifuge systems, resulting in 90% water recycling rates.
• Adopted a Biodiversity policy.
• Maintained gender parity on the Board in 2022, with 50% female representation.
• Enhanced vendor on-boarding through inclusion of human rights obligations.
• Completed 115,350 "Take 5s", which is a risk assessment tool used to identify and control hazards encountered on site and in the environment where the task is being completed.

The report is available on our website at: www.majordrilling.com/2022 Sustainability Report

Forward-Looking Statements

This news release includes certain information that may constitute "forward-looking information" under applicable Canadian securities legislation. All statements, other than statements of historical facts, included in this news release that address future events, developments, or performance that the Company expects to occur (including management's expectations regarding the Company's objectives, strategies, financial condition, results of operations, cash flows and businesses) are forward-looking statements. Forward-looking statements are typically identified by future or conditional verbs such as "outlook", "believe", "anticipate", "estimate", "project", "expect", "intend", "plan", and terms and expressions of similar import. All forward-looking information in this news release is qualified by this cautionary note.

Forward-looking information is necessarily based upon various estimates and assumptions including, without limitation, the expectations and beliefs of management related to the factors set forth below. While these factors and assumptions are considered reasonable by the Company as at the date of this document in light of management's experience and perception of current conditions and expected developments, these statements are inherently subject to significant business, economic and competitive uncertainties and contingencies. Known and unknown factors could cause actual results to differ materially from those projected in the forward-looking statements and undue reliance should not be placed on such statements and information.

Such forward-looking statements are subject to a number of risks and uncertainties that include, but are not limited to: the level of activity in the mining industry and the demand for the Company's services; competitive pressures; global and local political and economic environments and conditions; the level of funding for the Company's clients (particularly for junior mining companies); exposure to currency movements (which can affect the Company's revenue in Canadian dollars); the integration of business acquisitions and the realization of the intended benefits of such acquisitions; efficient management of the Company's growth; currency restrictions; safety of the Company's workforce; risks and uncertainties relating to climate change and natural disaster; the Company's dependence on key customers; the geographic distribution of the Company's operations; the impact of operational changes; changes in jurisdictions in which the Company operates (including changes in regulation); failure by counterparties to fulfill contractual obligations; disease outbreak; as well as other risk factors described under "General Risks and Uncertainties" in the Company's MD&A for the year ended April 30, 2023, available on the SEDAR website at www.sedar.com. Should one or more risk, uncertainty, contingency, or other factor materialize or should any factor or assumption prove incorrect, actual results could vary materially from those expressed or implied in the forward-looking information.

Forward-looking statements made in this document are made as of the date of this document and the Company disclaims any intention and assumes no obligation to update any forward-looking statement, even if new information becomes available, as a result of future events, or for any other reasons, except as required by applicable securities laws.

About Major Drilling

Major Drilling Group International Inc. is one of the world's largest drilling services companies primarily serving the mining industry. Established in 1980, Major Drilling has over 1,000 years of combined experience and expertise within its management team alone. The Company maintains field operations and offices in Canada, the United States, Mexico, South America, Asia, Africa, and Australia. Major Drilling provides a complete suite of drilling services including surface and underground coring, directional, reverse circulation, sonic, geotechnical, environmental, water-well, coal-bed methane, shallow gas, underground percussive/longhole drilling, surface drill and blast, and a variety of mine services.

For further information:
Ian Ross, Chief Financial Officer
Tel: (506) 857-8636
ir@majordrilling.com