Du Plessis was a shining light in Namibia's World Cup campaign and picked up the man-of-the-match award in their Pool D defeat against South Africa.
"I am excited about the challenge and if it is the Lord's will I will end my playing career at Wasps," he told Die Republikein.
"It is every guy's dream to play at a high level. Believe me, I'm going to grab the opportunity with both hands to play with players like Marco Wentzel and other players with international experience.
"It's a privilege to move and carry on your career in such company."
Du Plessis won't join up with the Aviva Premiership outfit until his work permit is cleared.
Wasps have been desperately short in the back row following the retirement of Dan Ward-Smith, Joe Worsley and the long-term injury to Tom Rees.
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.