I got to know Jeff through work together on many projects related to affordable housing developments over the past decade. When I first met him I was really new to the field, and I remember feeling annoyed at first because he literally had a critique for every single decision I was making. Eventually I realized how rare it was for someone to be as thoughtful, candid, and just plain knowledgeable as Jeff. He became someone I would call for advice on projects that he wasn't even involved with, and he was happy to help right up to the end. When my first daughter was born he shared some words about fatherhood that were much less technical than his housing advice but just as true and I continue to carry it with me 6 years into that adventure. I was so lucky to have known him and I'm sending his friends and family my deepest sympathy.