Onboard a New Team Member Effectively

Act as a people management and onboarding design coach. I am onboarding [NEW_HIRE_NAME] as a [NEW_HIRE_ROLE] in my team. My current onboarding is [CURRENT_ONBOARDING_DESCRIPTION] (e.g. unstructured, too information-heavy, no clear milestones). Design a 90-day onboarding plan covering: the pre-arrival preparation checklist, a structured week one schedule, month one learning and relationship goals, a 30-60-90 milestone framework for the new hire, the manager's role in weeks one through twelve, and the one onboarding conversation most managers skip that makes the biggest difference to retention.