Our Team

Lauren Mandel, PLA, ASLA - BLOOMTIME’s founder and CEO

Lauren Mandel, PLA, ASLA


We’ve got your back. Bloomtime’s founder—Lauren Mandel, PLA, ASLA—is a licensed landscape architect with 15 years of experience. She has contributed to the design of more than $100M worth of landscapes, including more than 60 roof gardens. Her work, which integrates fringe solutions into professional practice, has been recognized through 12 professional awards and 24 publications. Her past clients include the University of Pennsylvania, Barnes Foundation, and Brooklyn Botanic Garden.

In 2013 Lauren authored EAT UP: The Inside Scoop on Rooftop Agriculture (New Society Publishers), the first full-length book about rooftop food production, and remains a leading expert in the field. She was also the principal researcher and author of the “Site Commissioning White Paper” (U.S. General Services Administration, 2017), a federal-policy tool aimed at elevating the value of landscapes by proving their social, environmental, and financial performance. Lauren holds a Master of Landscape Architecture from the University of Pennsylvania and a BA in Environmental Science from Skidmore College.

Klielle Glanzberg-Krainin, BLOOMTIME sales

Klielle Glanzberg-Krainin


After spending the last few years farming, Klielle is excited to return to her hometown of Philadelphia and join the team at Bloomtime, where she looks forward to merging her agricultural and horticultural experience with her passion for helping others connect with the natural world. Klielle has a BA in American Studies from Tufts University and a certificate in Permaculture Design.


Hudson Greenberg

Landscape Barkitect

Hudson is a lifelong nature lover. Whether he’s hiking mountains, rolling in the grass, or catching frisbees, there’s nowhere he’d rather be than outdoors. At Bloomtime, Hudson lends his outdoor-enthusiast expertise when reviewing plant combinations and inspecting R&D installations at the Bloomtime headquarters.

Charlie Miller, P.E.

Charlie Miller, P.E

Product Advisor

Charlie Miller, P.E. is a civil engineer who introduced green roof technology to the U.S. in the ’90s and continues to bring innovative solutions to market. He is the founding principal of the green roof design and engineering firm Roofmeadow.

Abdallah Tabet, RLA, RA

Abdallah Tabet, RLA, RA

Design Advisor

Abdallah Tabet, RLA, RA is a licensed landscape architect and architect with extensive international experience. He is an associate at a world-renowned, landscape architecture firm, and holds degrees from the University of Pennsylvania, American University of Beirut, and The Lebanese University.

Michael Mandel, PhD

Michael Mandel, PhD

Tech Advisor

Michael Mandel, PhD is an Associate Professor of Computer and Information Science at Brooklyn College, working at the intersection of machine learning, signal processing, and psychoacoustics. He holds degrees from MIT and Columbia University, and has worked as a postdoctoral research fellow, algorithm developer, research scientist, and assistant professor with funding from Google and the National Science Foundation.

Student Contributors

University of the Arts: Kamakshi Arora, Raunak Deshmukh, Anne Irving

University of Pennsylvania, The Wharton School: Meghan Chung, Amanda Cohn, Kamran Elahi, Augustin Gar, Agustin Garcinuno, William Gallagher, Ricardo Gonzales, Aden Horowitz, Rebecca Jiang, Ali K., Chaya Levin, Vasu Macherla, Yadel Zazueta Monroy, Marialena Mouaikel, Emmanuel Nkurunziza, Vivek Olumbe, Nicholas Pawlowski, Alison Royce, Julian Samek, Cherie Sio, Pranav Srinath, Isaac Tham, Nicole Windreich, Lorry Wu, Amanda Yao, Julian Yau, Mary Ye, Edward Zhang


Professional Contributors

Ravid Butz, MSE: Business coaching

Gregg Tracton: Web development

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