Perform triage if you need it

If you're leading a team and a key member is leaving, don't try to solve the issue by yourself. Instead, involve HR and a set of cross-functional peers. Look at what's required for the role and brainstorm about who could best fill the position. They may recommend someone you’ve never thought of.

Document the most immediate team needs and actions, and identify who can fill those roles. It may be possible to hire temporary or freelance help to fill gaps.