Rischitelli, who has filled the role of on-field captain for the most of the season in the absence of Gary Ablett, said he is happy with the direction the club is going in.
“I’m really pleased to extend my contract, especially as the future direction of the club has never been clearer,” the 29-year-old said.
“(It) has been a tough year, but I really believe we have learnt more as a group in 2015 as we ever have before.
“It’s about living and breathing the brand, our values and standards, if we can do that anything is possible. The players are up for it and I know our supporters are as well.”
Lonergan has re-signed for two years, after a breakout year for the 20-year-old.
“I’m rapt to have re-signed – the club has been really good to me and I plan to repay them in the future,” Lonergan said.
“I definitely feel as though 2016 will be a defining year for our club. We really want to build something pretty special and after a challenging year we are all pretty excited about the direction we are heading.”