"If you line up a set of priorities and one of the things I work on from a policy perspective, trade would be one of them," Rometty told "Squawk Box" from the World Economic Forum in Davos, Switzerland.
The U.S., Canada and Mexico are working to modernize the North American Free Trade Agreement amid persistent criticism from the Trump administration that the U.S. is getting a raw deal.
Rometty said she's "a strong supporter of free and fair trade everywhere over the world" given that IBM is in 170 countries.
Rometty said many trade deals did updating.
"There was really nothing like a digital chapter in them. Nothing to protect IP, nothing to let data flow. So, they absolutely need to be modernized," she said.
During an appearance at Davos, Canadian Prime Minister Justin Trudeau emphasized the importance of NAFTA and Canada's openness to including more nations in future trade deals.
Canada also announced that it will join 10 other countries in signing a revised Trans-Pacific Partnership in March. Trump rejected the trade group.
"My hope on a NAFTA is we do find a common ground," Rometty said Thursday. "I've spent a lot of time as well on digital trade."
The IBM chief advocated for Trump to create "new collar" IT jobs, saying that IBM these days does not always require it's employees to have a college degree.