Send a short "Welcome to the team" message to let new employees know how excited you are to have them. Here's how to make the best first impression.A "thank you for joining" membership letter should include a personalized greeting to the new member. Use the member's first name in your salutation. Craft a topnotch new employee welcome email with tips and examples to cover essential information for a smooth onboarding experience. Here are 10 things your welcome letter or email to new members must include plus a template that can be customized for your organization. Welcome to the County of Riverside! We are so excited that you chose to join our team. I'm writing this letter to help you get acclimated to your new position. Once you get your office area set up, I will introduce you to everyone.