Patrick McDonald

LEED AP, GACR, Principal

Patrick is Vice President of Onion Flats. He is a registered Master Plumber in Philadelphia, as well as a certified Operating Engineer of heavy equipment. He is a co-founder of Onion Flats LLC with his brother Tim. He brings twenty-seven years of mechanical trades’ expertise to the company’s projects. Additionally, he has the operations and management experience of owning a plumbing/heating/excavation company since 1985, with which he serviced contracts for the United States Naval Shipyard, SEPTA, and surrounding municipalities, including Aston, Haverford, Middletown, and Radnor Townships. Pat is accountable for all of Onion Flats project’s mechanical systems. He has been the catalyst in the company’s decision to take on sustainable building practices and renewable energy and is also a Certified Solar Panel Installer and a LEED Accredited Professional. Patrick and Howard Steinberg are managing partners of GRASS, the company's Green Roof and Solar Division. Additionally, Patrick is a Passive House Certified Tradesman.



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