Board Member Bios

Board of Directors


Bertina Whytehead – President
Recreation Therapist, Mercy LIFE West Philadelphia

Motivated by a desire to serve her adopted community, Bertina joined The Junior League of Philadelphia in 2003, and has served in various leadership positions in the league. Bertina also volunteered with Girls Inc., Philadelphia & Southeastern New Jersey 2006-2011 where she has served in various chairperson positions. She joined POP through their community partnership with The Junior League in 2013 by attending their League Wide Service day and learning about the organization at their membership meeting. She currently serves as Recreation Therapist at Mercy LIFE West Philadelphia. A native of Miami, Bertina is an alumni of St. Thomas University with a degree in Liberal Arts Studies. She lives in Drexel Hill, and spends her time not only doing community service but also as a performing member with The Savoy Company.


Michael Drennan – VP/President Elect
Co-owner, Carolyn's Shade Gardens

Michael Drennan is a retired Wall Street executive who spent over 30 years in the investment management business. Upon retiring he joined his wife, Carolyn Walker, as the co-manager of Carolyn's Shade Gardens in Bryn Mawr, PA. Their boutique plant nursery specializes in shade perennials and native plants. Mr. Drennan has served on several boards and is excited to join the Philadelphia Orchard Project to help further their mission.

Chris Carrington – Treasurer
Owner, City Garden Guru

Chris Carrington owns and operates City Garden Guru, a landscape design company serving Greater Philadelphia. She first encountered POP as the Director of Awbury Arboretum Landscape Services. As a Wharton MBA Graduate, Chris combines many years of marketing and management experience, gained in the advertising world, with her passion for horticulture, which she has nurtured through becoming a Master Gardener, a graduate of the three year Barnes Foundation Horticultural Program, 15 years of working in PHS’s City Harvest Program, NOFA Certification, Tree Tender Certification and frequent volunteer work. She is passionate about food – growing it, donating it, cooking it, sustaining it and the justice that must form around it. When she is not on the job or in a garden, you can find her taking more horticulture courses, cooking, reading, at the orchestra, opera or theater, throwing a soup or tomato tasting party, hiking in the Adirondacks, trying a new ethnic restaurant or travelling someplace new.


Martha Moffat – Secretary
Site Manager, Woodford Mansion and Ryerss Museum & Library

Martha was instrumental in establishing POP’s flagship orchard in Fairmount Park at Woodford in 2008. She has seen first hand the many positive effects of an orchard in the park for the community nearby and believes in the power of connecting people with nature and fresh produce (and historic sites). She was raised in rural Northeastern Pennsylvania next to a commercial apple orchard. Her love of gardening began at an early age and continues to this day. Martha earned a B.A. in Political Science from Dickinson College and an M.S. in Historic Preservation from Columbia University.


Heather Zimmerman –
Program Director, Awbury Arboretum

Heather Zimmerman is currently the Director of Education at POP partner site Awbury Arboretum, where she coordinates and teaches environmental, horticultural and homesteading classes for people of all ages. She has worked in urban education for the last 20 years and for the last 7 worked as a horticulture and farmer educator for Penn State Extension and various sites in the neighborhood of historic Germantown where she lives. A graduate of the Barnes Foundation Horticulture Program, Heather is passionate about growing both ornamentals and edibles. She has worked with POP for the last 4 years as a volunteer and orchard liaison.


Chloe Cerwinka –
Landscape Planner, UPenn

Chloe Cerwinka is a Landscape Planner at the University of Pennsylvania, where she's spearheading efforts to make Penn more sustainable through improved landscape management methods, bicycle infrastructure and increased diverse and productive plantings. She is devoted to her hometown of Philadelphia, returning in 2010 to farm for her childhood food co-op at Weaver's Way Farm, and later co-founded Heritage Farm, a 1.5 acre urban community farm. Chloe is also a member of the Horticulture Committee at Bartram's Gardens. She received her B.A. in Design of the Environment from Penn, and worked as an architectural designer for ten years before seeing the light.


Corey Jameson –
Owner, Corey Jameson Design

Corey Jameson is a graphic designer, illustrator and printmaker living in Philadelphia who is passionate about social and environmental issues. This interest has led her to pursue a certificate in Permaculture Design and to become a trainee of the Penn State Master Gardeners Program. She currently runs her own design business Corey Jameson Design where she specializes in branding and identity for many organizations including non-profit and sustainable businesses.


Michelle Lawson –
Instructor, Jefferson University (Philadelphia University + Jefferson University)

Michelle Lawson is a practitioner-scholar who is an experienced manager and systems developer, farmer, and Master Gardener. Michelle's professional areas of practice are in sustainability, change management, talent retention, sustainable agriculture, experiential learning, training and development as well as curriculum development. Her current research is in the areas of organizational sustainability, sustainability, human resources management in green organizations and non-profits, urban agriculture, food and social justice, public health, food systems, food law and policy, and employee training and program management. She has participated as a panelist, presented papers and research in national conferences, including her work, 'Urban Agriculture and Food Justice Amid Uncertainty: Fostering Sustainability and Volunteerism Through Storytelling and Therapy'.

Anne Taylor –

After serving on the POP board from 2009-2015, Anne rejoined the board in 2017. An attorney by day, Anne loves turning her non-work time to POP, and remains impressed at the continued growth in the breadth and depth of POP's partnerships and educational programming, as POP consistently pursues its mission of planting and supporting community orchards in the City of Philadelphia.


Julie Ulrich –
Director of Urban Conservation, Nature Conservancy

Julie Ulrich serves as the Director of Urban Conservation for The Nature Conservancy in Philadelphia, overseeing a new initiative that researches, designs, and implements nature-based solutions for cities. She is committed to the belief that built and natural environments are deeply tied and must equitably benefit all communities. Julie has extensive experience in sustainable planning and design and has worked at the intersection of urbanism, ecology, and the public for over ten years. Prior to joining the Conservancy, Julie worked for the City of Portland, Oregon, developing strategies and projects to incorporate green infrastructure solutions for stormwater issues as an alternative to traditional infrastructure methods. Julie is a Senior Fellow with the Environmental Leadership Program and was named as one of Next City’s Vanguard, a selected group of 40 best and brightest young urban leaders whose ideas for cities, experience in the field and ambition for the future all show great promise to improve cities across sectors. She speaks nationally and internationally on sustainable design, green urbanism, and the link between social and ecological resiliency and has served on the faculty of Philadelphia University’s Sustainability Program and as a guest lecturer at the University of Pennsylvania. She first started collaborating with POP on the Casa Del Carmen and Monumental Baptist Church orchards last fall.

Jane Mackie –
Sustainer, Junior League of Philadelphia