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NXE.TO ·

NexGen Energy Hires Senior and Exploration Geologists Addition of two highly qualified and experienced uranium geologists. Radio drilling permit received

Management Changes Exploration Programs Permits & Approvals

NexGen Energy Ltd

2200 – 885 West Georgia Street Vancouver, BC V6C 3E8

Hwww.nexgenenergy.ca 

NEWS RELEASE

NexGen Energy Hires Senior and Exploration Geologists

Highlights

  • Addition of two highly qualified and experienced uranium geologists.
  • Radio drilling permit received

Vancouver, B.C., May 22, 2013 – NexGen Energy Ltd (NXE: TSX-V) ( the “Company” or “NexGen”) is pleased to announce the addition of two highly qualified and experienced uranium geologists to its technical team and receipt of a drilling permit for Radio.

Geological Appointments

James Sykes has joined NexGen as a Senior Geologist. Mr. Sykes joins NexGen from Rio Tinto. He originally commenced with Hathor in 2007 prior to the discovery of Roughrider and transferred to Rio from Hathor in February 2012 as part of its acquisition of Hathor. Mr. Sykes was a key member of the team that constructed the original 3D geological model of the Roughrider system, which ultimately led to the discovery of the Roughrider East and Far East deposits. Prior to Hathor, Mr. Sykes was a Project Geologist with Denison Mines Corp.

Matthew Schwab has joined NexGen as an Exploration Geologist. Mr. Schwab also joins NexGen from Rio Tinto having also worked previously for Hathor on the Roughrider deposit. Mr. Schwab was a member of the technical team responsible for defining the mineralized zones of the Roughrider Deposit and exploring the Roughrider property for further zones of mineralization.

Radio Drilling Permit

At the Company’s Radio Project, located immediately adjacent to Rio Tinto’s Roughrider deposit, the application for summer drilling has been approved. Drilling is expected to commence in late June for a 4,400 metre diamond drilling program focused on the target area immediately east of Radio’s western boundary that covers the interpreted structural extension that hosts the adjacent Roughrider discovery.

Leigh Curyer, NexGen’s CEO commented, “the appointment of Mr Sykes and Mr Schwab to our technical team in joining Andrew Browne, Vice President of Exploration & Development, is a significant endorsement of the uranium prospectivity of our properties. Their uranium exploration expertise and knowledge of the Roughrider deposits is highly valuable and extremely relevant to our portfolio of properties. It is with pleasure that I welcome them aboard.”

About NexGen

NexGen is a British Columbia corporation with a focus on the acquisition, exploration and development of Canadian uranium projects. NexGen has a highly experienced team of exploration professionals with a track record in the discovery of unconformity-style uranium deposits in Canada.

NexGen owns a portfolio of highly prospective uranium exploration assets in the Athabasca Basin, Saskatchewan, Canada, including, an option to earn a 70% interest in the Radio Project, immediately adjacent to Rio Tinto’s Roughrider Deposit and a 100% interest in Rook 1, immediately adjacent to the North East of Patterson Lake South (PLS) and holds one of the most dominant land positions on the Western side of the Athabasca Basin.

Leigh Curyer, Chief Executive Officer NexGen Energy Ltd.

[email protected] www.nexgenenergy.ca

FOR FURTHER INFORMATION PLEASE CONTACT:

Kin Communications Tel: 604 684 6730 Toll free 1 866 684 6730 Email: [email protected] Website: http://www.nexgenenergy.ca

The TSXV has neither approved nor disapproved the contents of this press release. Neither the TSXV nor its  Regulation Services Provider (as that term is defined in the policies of the TSXV) accepts responsibility for the  adequacy or accuracy of this release. 

Forward-Looking Information

This news release contains "forward‐looking information" within the meaning of applicable Canadian securities  laws.  Generally,  but  not  always,  forward  looking  information  is  identifiable  by  the  use  of  words  such  as  "expects" "anticipates", "believes", "projects", "plans", and similar expressions. Forward‐looking information is  prospective and by its nature requires the Company to make certain assumptions and is subject to inherent  risks and uncertainties. Such information is not a guarantee of future performance and undue reliance should  not be placed on forward‐looking information. Although the assumptions made by the Company in providing  forward  looking  information  are  considered  reasonable  by  management  at  the  time  the  forward‐looking  information is given, there can be no assurance that such assumptions will prove to be accurate. Forward‐ looking information also involves known and unknown risks and uncertainties, which may cause actual results  in  future  periods  to  differ  materially  from  any  projections  of  future  results  expressed  or  implied  by  such  forward‐looking  information,  including  changes  in  exploration  programs  based  upon  results  of  exploration;  future prices of metal; availability of third party contractors; availability of equipment and supplies; failure of  equipment  to  operate  as  anticipated;  accidents,  effects  of  weather  and  other  natural  phenomena;  environmental risks; community relations; and delays in obtaining governmental approvals or financing. There  can be no assurance that forward‐looking information will prove to be accurate, as actual results and future  events could differ materially from those anticipated, estimated or intended. NexGen undertakes no obligation  to update or reissue forward‐looking information as a result of new information or events except as required by  applicable securities laws. The reader is cautioned not to place undue reliance on forward‐looking information.