Pablo Henn has signed for London Welsh, the team that have recently been promoted to the Aviva Premiership from the RFU Championship, according to BBC Sport.
The London team will return to the Premiership next season after one-year absence.
Experience will be needed to challenge for survival and the services of Limoges prop Henn will be a massive bonus for Justin Burnell's team as the 31-year-old player has spent a substantial amount of his career in the Top 14.
"Pablo really impressed against England last summer, he's made over 100 appearances in the Top 14 in France."
On the international stage Henn has featured nine times for Argentina since making his debut in 2004, and in his nine appearances he has helped Argentina to seven victories as well as scoring one try.
"He's just an out-an-out natural scrummager." Burnell added.
2006 was when Henn made his professional debut for Stade Francais in the Top 14 and he went on to represent the Paris team six times in two years, scoring one try.
After the two years the 31-year-old spent with the 2007 champions, he then went on to join US Montauban for one season and CA Brive, playing over 104 games in over six years.
Henn is the 21st player that London Welsh have brought in this summer, with the likes of Olly Barkley and Nic Reynolds both joining from Scarlets. The promoted side have also released 12 players.
London Welsh managed second place in the Championship last season and in the 23 games they played, they won 19 and lost four, only missing out on first place through try bonuses.
In the play-offs, Burnell's men beat Leeds Carnegie in the semi-finals over two legs 60-58 before beating Bristol Rugby 48-28 in the final.
Burnell has recruited six new props this summer with Nathan Trevett and James Tideswell remaining from the previous season.
Henn has great experience and the Dragons will need his knowledge and brute strength to see them through another campaign and on to better things.
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