The 26-year-old is a mobile lock who made both of his appearances for the All Blacks as a replacement against France in 2009.
London Irish head coach Toby Booth believes Evans' experience will be a valuable asset to the team.
"Bryn is a huge addition to our squad for next season," said Booth.
"His physical presence and capabilities around the field will hold us in good stead for next season.
"The experiences Bryn will bring from playing for the Hurricanes and All Blacks will no doubt rub off on the young players we have coming through at lock."
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The Barbarians are one of the top invitational rugby sides with a long history and classic rugby jersey.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Lions get ready for their matches with this green training jersey. It's what the players wear. Get in the Gear!
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The Lions are ready to get their Australia tour underway. They arrive in Perth on Monday.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.