Cousins is retiring at the end of the season after 15 years in the game.
Demetriou said he was proud of the way the football organisations were banding together to support the 32-year-old.
"The AFL Players' Association - to their great credit - and the Richmond Football Club and the AFL have had various chats about how we can support Ben and his transition out of football," Demetriou said.
"We do our best to make sure players leaving the game just don't leave the game, we do have great support networks around in football clubs and in the industry."
Demetriou also congratulated Cousins on an outstanding career and said he had made a significant contribution to the game.
"He's been a great champion of the game, with an incredible capacity to run and make play, a Brownlow Medallist and a premiership player," Demetriou said.
"And on top of that, he's overcome a huge issue in his life, an illness, which he still battles, and it's just been great seeing him back playing football.
"I wish him well into the future."
But Demetriou wouldn't commit to having the AFL offer Cousins a job, possibly in drug education.
"There's no doubt that the Richmond Football Club, and hopefully football, has played a role in his rehabilitation," Demetriou said.
"I hope that he can stay in football in some capacity, because he's got a lot to offer... [but] it's really up to what Ben wants to do."
