My manager changed in H2, and my previous manager became my skip. While my current manager has a decent idea on the current projects I am working on and their importance, sometimes I see them mixing up specifics, which could be because they’re still ramping up. With that context, how do I make sure my manager represents my year long performance in upcoming calibrations well? Should I give them context on all my work in our 1:1s, especially my H1 work as they weren’t in my team?
Yes, you should absolutely share the context with them.
I like this phrasing since it starts by focusing on the relationship between the manager and the team, rather than just your performance. This is also an opportunity for you, as a senior engineer, to provide insight and context on projects that you're not directly involved in. That's a good trust-building opportunity and a nice way to expand your own influence.