Chansiri is expected to make a number of changes at Hillsborough, as he looks to drive the club forward, and this is the first clear sign of his intentions.
Roeder and Pearson bring with them a vast amount of experience and will form part of an advisory committee at boardroom level.
It is an intriguing move for Chansiri to make and the Thai owner was delighted to have the duo on board, judging by his comments on the club's official site.
"Adam and Glenn are seasoned football professionals and I am delighted they are joining us on this exciting journey, which we all intend will lead to the Premier League," he said.
“To achieve that ambition, it is imperative for the prosperity of our club that anyone I introduce is of absolutely the right football calibre and both Adam and Glenn meet this requirement.
“They will work alongside our head coach Stuart Gray having been carefully selected to focus on a clearly defined scope of responsibility deemed vital to the club’s interests and future successes, on and off the pitch."
Roeder and Pearson will bring with them a huge amount of knowledge and they should also have strong contacts within the game, having gained so much experience.
The hope is that they will be able to improve Wednesday's chances of success for the future, with the club aiming to make it to the Premier League in the near future.
Wednesday fans are optimistic for the future, but there have been a few concerns raised by this latest move.
Most Owls supporters are still firmly behind current boss Stuart Gray and they feel that the additions of Roeder and Pearson could undermine him slightly.
Here is the best reaction to Wednesday's recent moves from their supporters on social media site Twitter.
Glenn Roeder coming into the club as an advisor...hope this doesn't spell the end for Gray. He's done, and is doing, well #SWFC— Dominic Stevenson (@dom_stevenson) April 20, 2015
Adam Pearson is a good, if slightly left-field appointment. More sceptical about Roeder, but certainly brings some good contacts #swfc— Hugh (@hugh_wragg) April 20, 2015
#swfc New committee sounds interesting, Pearson experience should help; overall accountability if plans go awry may be an issue. Hope not!— Wendy Birks (@WEBI48) April 20, 2015
Appointments @ #swfc undermine Stuart Gray. Right noises will be made now, but there's no avoiding his position is less secure as a result.— Vern (@lecrin) April 20, 2015
Exciting times at Hillsborough,2 great appointments today, experienced and knowledgeable guys,most exciting pre season in a generation #swfc— paul thorley (@pthorley) April 20, 2015