Wilson, 29, will partner American teenager Graham Rahal in the team this season in the squad that is co-owned by film legend Paul Newman as they go for their ninth ChampCar title.
"I am extremely pleased and proud to be joining Newman/Haas/Lanigan Racing," said Wilson. "For the entire time I have been competing in Champ Car, they have been the strongest team.
"Sebastien has left pretty big shoes to fill, but I have big feet! Joking aside, I am excited to have the opportunity to add to the results Sebastien and other drivers before me have achieved for the team.
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"I am hoping to learn my environment quickly and let the results take care of themselves. I am confident that with having a team like this behind me, we can be championship contenders for 2008."
After his Formula One career with Minardi and Jaguar came to an end in 2003, Wilson moved to the USA and took the rookie of the year title in his maiden season with Conquest Racing.
The following season saw a switch to RuSport, the team with which he has collected all four of his career victories to date. He has been runner-up to Bourdais in the championship for the past two years.
His new team-mate Rahal, 19, became the youngest driver in series history to take a podium when he finished second at Houston last year.
Ending up fifth in the championship has given the son of three-time champion Bobby Rahal something to build on.
"I am really looking forward to entering my second season with such a great team, and most of all building on a solid foundation that was started last year," said Rahal.
"I think that we should have a strong chance at winning races, capturing podiums and hopefully earning another championship for this historic team.
"I think we can all look forward to new beginnings, with great new events, and keep growing the races we have had for many years. This season will hopefully be another championship year for myself, and the whole team."
Both drivers will test for the team at Sebring in Florida next week.
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