MONTREAL, QUEBEC–(Marketwire – May 14, 2012) – MDN Inc. (“MDN”) (TSX:MDN) is pleased to announce today’s appointment of Robert LaVallière as the Company’s Vice President, Corporate Development. Before joining MDN, Mr. LaVallière was Vice President, Corporate Affairs for Anvil Mining, a copper producer, prior to which he was Manager, Investor Relations at Cambior. Robert LaVallière has over 25 years of experience in the mining industry, covering exploration, project assessment, mergers and acquisitions and communications, both nationally and internationally. He has a bachelor’s degree in geology and a master’s degree in business administration (MBA). Serge Bureau, MDN’s President and Chief Executive Officer, said that: “I am very pleased to have Robert joining our management team. His extensive experience will be a major asset for the development of our projects and the growth of the Company.”

About MDN

MDN Inc. (TSX:MDN) is a mining exploration and development company with properties in Quebec and Tanzania. In Tanzania, MDN has a 30% participating interest in the Tulawaka gold mine, which produced over 84,000 ounces of gold in 2011, as well as two promising gold projects, Ikungu and Nikonga. In Quebec, MDN owns a 72.5% interest in Crevier Minerals Inc., which owns an NI 43-101 niobium-tantalum resource that is presently at the feasibility study stage.

Forward-Looking Statements Other than statements of historical fact, all statements in this release that address events or developments that the Company expects to occur are forward-looking statements. Although the Company believes that the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance, and actual results may differ materially from those in the forward-looking statements. Factors that could cause the actual results to differ materially from those in forward-looking statements are discussed in greater detail in the Company’s most recent Annual Information Form filed on SEDAR, which also provides additional general assumptions in connection with these statements. Investors and others who base themselves on the Company’s forward-looking statements should carefully consider the factors mentioned in the Annual Information Form as well as the uncertainties they represent and the risk they entail. The Company believes that the expectations reflected in those forward-looking statements are reasonable, but no assurance can be given that these expectations will prove to be correct, and as such, the forward-looking statements in this press release should not be unduly relied upon. These statements speak only as of the date of this press release.

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