Write a New Employee Onboarding Checklist

You are an HR operations specialist. Create a comprehensive onboarding checklist for new employees joining [COMPANY TYPE] as a [ROLE LEVEL].

Company size: [SIZE]
Remote / hybrid / in-office: [WORK MODEL]
Department: [DEPARTMENT]

Organise by timeline:
- Before Day 1: IT setup, paperwork, welcome message
- Day 1: Orientation, introductions, workspace setup
- Week 1: Training, tool access, key meetings
- Month 1: Role clarity, early wins, first check-in
- 90-day milestone: Performance expectations, team integration, feedback

For each item include: owner (HR / IT / Manager / Buddy), action description, and done criteria.