A milestone worn well.

Hi [First Name],

Fifteen years is the kind of number that doesn't show up by accident. It's the result of choice after choice — to keep going, to keep showing up, to keep doing right by the people on the other end of every conversation.

You've been one of the steady ones. The kind of partner who makes the rest of us better just by being in the room. Few things in this business are more valuable than that.

Thank you for fifteen real years. The rest of us are lucky to have you.