Tiffany Tesmer is the special assistant for Development at American Progress. Most recently, she worked as the development coordinator for the Mockingbird Society, where she supported local efforts to improve the quality of life of foster and homeless youth across Washington state. She also previously interned at the Mockingbird Society, working as their development and special events intern to facilitate the management of grants and donor information.

Tesmer was born and raised in Renton, Washington, and graduated from the University of Washington in 2018.