For an Engineering example, it'll usually go like this, at least where I've worked: IC1 = Associate Software Engineer IC2 = Software Engineer 1 IC3 = Software Engineer 2 IC4 = Software Engineer 3 / Senior SWE IC5 = Principal Software Engineer IC6 = Staff Software Engineer Any higher and you're getting into Senior Staff/Distinguished territory. Not all companies follow this exact mapping though, so that's why you'll see like Amazon L4 start at Software Engineer I, they don't really have an 'associate SWE' level. And some companies use different language, like Microsoft calls Principal level "Partner," etc.