Marshall Green is a fourth-generation owner and the dedicated nursery manager at Primex Garden Center in Glenside, Pennsylvania. After growing up around Primex, Marshall attended New England Culinary Institute and pursued a career as a chef in Philadelphia. In 2014 Marshall came home to Primex where he settled in as the woody plants buyer and nursery manager. As the woody plants buyer, Marshall is well attuned to current plant trends and is always looking for the next ‘it’ plant. You can easily spot him in the nursery, typically donning a wide-brimmed straw hat, eager to help and share his extensive knowledge.

Ari Miller, RLA, ISA Certified Arborist - Ari Miller is the director of design at Hinge Collective in Philadelphia, Pennsylvania, a public interest design firm that puts community engagement and public participation at the forefront of their practice. As both a landscape architect and arborist, Ari has always advocated for the integration and restoration of natural systems in urban design. Over the course of his 17-year career, Ari has worked as an arborist at Morris Arboretum, as a green roof design specialist at Roofmeadow, and has also led large-scale civic design projects at OLIN Partners. At Hinge, he uses this experience to help communities find design solutions that best support human and ecological health in their own neighborhoods through the enhancement of public space and community-led planning. Some notable projects include the Philly Tree Plan, Resilient Communities Stormwater Initiative, Unity Park, and Frankford Pause Park. Ari has also been adjunct faculty at the Weitzman School of Design at the University of Pennsylvania and Jefferson University.

Since April 2016, Craig Roncace has been the Urban Park Manager for the University of Pennsylvania. The Urban Park Department consists of five shops, each with its own Supervisor, and 58 staff who represent two unions. The Urban Park operation covers campus landscaping/maintenance, athletic field management, Penn Park, all hard surface maintenance, and the campus-wide waste/recycling program.
Before Penn, Craig worked in multiple roles as the Grounds/Area Manager for Temple University, at both their Ambler and Main Campus locations.
Craig was first introduced to the landscaping world by way of the golf course. He gained hands-on knowledge at an early age and quickly developed a love for the outdoors. He earned a degree in turfgrass management from Rutgers University, and within a few years, became the Golf Course Superintendent for a local private golf course in New Jersey.
Craig spent three years as a landscape manager for a large New Jersey based landscaping corporation, where he managed multiple teams in both turfgrass and horticulture maintenance within the local New Jersey/Pennsylvania Region.
In addition to his turfgrass education, Craig earned his MBA from Temple University’s Fox School of Business, and his B.A. from Eastern University.
Craig is an active member of multiple committees at Penn. One is Penn’s Ecological Landscape and Stewardship Plan (ELSP) Committee. The ELSP committee helps ensure Penn continues its efforts, from planning/design to maintenance, of successfully following a more ecological landscape within the ever changing functionality of the campus. These efforts cover, but are not limited to, storm water management, mature tree preservation, native plants, research, and training.
In addition to his current position at Penn, Craig is the owner of SportsTurf Management Resources, LLC which is a sports turf, lawn, and landscaping consulting firm. Craig enjoys helping others manage their own properties, both residential and professional, with a portion of the proceeds going towards suicide awareness.