Denison Mines Corp. ('Denison' or the 'Company') announced the appointment of Mr. Ron F. Hochstein as Chair of the Board of Directors ('Board Chair'). Mr. Hochstein was elected Board Chair, and Mr. Brian Edgar was elected Lead Director, at a meeting of the Company's independent directors following the Company's Annual General Meeting. The Company is also welcomed David Neuburger and Jennifer Traub to the Board of Directors. While both Mr. Hochstein and Mr. Edgar are considered by the Board to be independent, the appointment of Mr. Edgar as Lead Director is a corporate governance initiative designed to enhance the Company's overall governance practices by further capitalizing on the diversity of qualifications that each of Denison's directors brings to the Board - including Mr. Edgar's 30-plus years of experience serving on public company boards and 16 years of practice in corporate and securities law. Mr. Hochstein is currently the President and Chief Executive Officer of Lundin Gold Inc. ('Lundin Gold'), which owns and operates the high-grade and multi-million-ounce Fruta del Notre ('FDN') gold mine in southeast Ecuador. Brian Edgar is the Chairman of Silver Bull Resources Inc. Mr. Edgar has served on the board of numerous private and public mining and oil gas companies and had co-founded a private investment company, Rand Edgar Investment Corp. Mr. Edgar has served as a director of the Company since March 2005. David Neuburger is a corporate director and consultant, with more than 30 years of experience in executive leadership, operations management, corporate strategic planning, projects, and mine engineering for companies involved in uranium, gold, nickel and copper/zinc mining. Jennifer Traub is a partner in the Securities Group at Cassels Brock Blackwell LLP and serves as Co-Chair of the firm's Mining Group. Ms. Traub represents both issuers and investment dealers in connection with MA, public and private securities offerings and other financing transactions.