The 25-year-old back-row has backed up his talking on the pitch this season, with a string of fine performances in Munster's opening seven GUINNESS PRO12 contests.
And Chisholm is sure that won't have gone unnoticed by Ireland head coach Joe Schmidt.
"The amount of heart he puts in on the field is fantastic," said Chisholm, speaking at an event to help launch Life Style Sports' new online delivery service.
"I wouldn't be surprised if he makes that next step into international rugby.
"I heard last week that he has got his international clearance to play for Ireland and I wouldn't be surprised if he makes that step.
"The way he's playing in the PRO12 week in, week out is amazing."
Munster are second in the GUINNESS PRO12 table with six victories from seven games and made a winning start to their European campaign with victory over Benetton Treviso in the Champions Cup.
And though Chisholm has been impressed by Stander, he believes Munster's strong start has been a real team effort.
"The great thing is we don't really depend on CJ," said Chisholm.
"CJ has a massive work-rate, he carries the ball, but if you see the blokes cleaning out around him doing their job, they've an enormous work-rate as well. It's those little finer details.
"Yes he might have the ball the whole time but it's the guys around him that are making that space. It is a big team collective effort."
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