Professor William S. Hammack Ph.D. or Bill Hammack is a Professor of Chemical & Biomolecular Engineering at the University of Illinois, where he has pioneered new and novel approaches to engineering outreach. He is the creator and host of the popular YouTube channel "engineerguy".

This petition is to show to him how much we as his audience miss him and wish him all the best for his upcoming book in March 2023 that also come with a complimentary video on his channel.