Take this with a pile of salt, but maybe it'll help.
Look, layoffs and re-orgs are an annual thing at TR, as the brass keeps changing its mind about where it wants to go. Right now the company is led by software fetishists who want TR to be a technology startup (content and expertise be damned). As I understand it, Bremner (and Waterloo) are where they have the teams they find most interesting and Bremner is probably what the previous poster was thinking of re the company making a significant investment in Toronto. So you're probably safest there, assuming you're on some tech dev team. But who knows. They could outsource your whole department to Eastern Europe next year. I'm told that's what happened to the devs who did software for internal systems.
My view is that the -teams- most at risk right now are the ones that don't fit into the new structure. In Toronto that's mostly legacy stuff from Carswell. To my knowledge, there's never been Carswell stuff at Bremner.
The -positions- most at risk are middle management, as the company leadership has declared war on org chart layers. To the extent that managers used to be promoted from below, that means we've lost a lot of institutional memory in the past year, as well as a lot of high salaries.
Even though this isn’t my original post but a reply on another thread by @YspFMeW-1gbr .