CSE is comparable to America's NSA in general function and scope. While CSIS does intelligence work with computers and hires a lot of programmers and analysts, CSE is traditionally the more technologically-focused of the two. You also hear significantly less about it than even CSIS.
Well we do know they successfully hacked the Brazilian government in the interests of private oil companies? That's something isn't it?
> CSEC had been meeting with the heads of our country’s largest energy companies and debriefing them on all the secrets they’ve stolen from Brazil’s mining and energy ministries.
They're good at their jobs.
edit: Spelling. They changed it from CSEC to CSE