our team

Jennifer Nicolas sitting in a woodland setting..

Jennifer Nichols


Jennifer has been involved in horticulture for over 25 years. In addition to owning and operating GreenWeaver Landscapes, she currently sits on the Middletown Twp., Delaware County Environmental Advisory Council, serves on the Board of Directors of the CRC Watersheds Association, and volunteers for the Sierra Club Pennsylvania Chapter Southeastern Political Action Committee.  

She holds a Certificate of Merit in Ornamental Plants and a Certificate of Merit in Landscape Design from Longwood Gardens where she taught both storm water management and landscape design.  Jennifer instructs on many aspects of ecological landscaping including holistic design, the use of native plants, and low impact property management. 

Greg Nicholos



Greg has been in professional horticulture for over 30 years. He is an International Society of Arboriculture certified arborist (MA-0510A), a PA certified pesticide applicator (BU10663), and is a member of the Professional Grounds Management Society (PGMS) where he served as the president in 2007. 

Greg started in landscaping by mowing lawns while attending George Mason University in Fairfax, Virginia. Upon graduation, he founded Twin Oaks Landscaping which he operated until 2004. Greg worked as Assistant Director of Facilities for Grounds at Bryn Mawr College in Bryn Mawr, PA, from 2004-2008.




Ryan has been involved in the landscape industry for 10 years. His experience spans from residential maintenance/installation to commercial contracting and landscape construction with heavy emphasis on project management. This involvement has given him hands-on experience with projects ranging from open space reforestation, hardscape design and construction, new construction installation, and renovations both small and large.

Ryan's certifications include: Interlocking Concrete Pavement Institute - Certified Paver Installer (ICPI CPI), National Concrete Masonry Association - Segmental Retaining Wall Installer (NCMA SRWI), Pennsylvania Landscape and Nursery Association - Sustainable Landscape Certificate (PLNA SLC), Occupational Safety Health Administration - 30 Hour General (OSHA 30).




Barb has been in office management and customer service for over 30 years. Though she has worked in a variety of industries, she feels most at home in a green, sustainable company.

Barb holds dual degrees in Architecture and Construction Management. She thrives on organization and numbers analysis and has strong communication skills.

To fulfill her creative side she does picture framing, sketches and makes jewelry. Time away from work is spent hiking, gardening, dancing, and practicing and teaching yoga.




John holds a Bachelor of Science degree in Landscape Architecture from Temple University. Through his schooling he developed a modern approach to designing multi-functional outdoor spaces that blend native ecology with practical, people-friendly solutions.

He incorporates ethical stormwater management, native plantings, and habitat gardens into his plans in an artful manner that reflects the aesthetic desires of his clients along with their sense of environmental stewardship.

John spent several years working in residential and commercial contracting, which provided him with a valuable perspective on the construction process necessary to transform a drawing on paper into a completed project.




Olivia has an undergraduate degree from the University of Delaware in Landscape Architecture with a minor in Horticulture, and a background in fine and studio arts. Prior to joining the GreenWeaver team, Olivia held positions at the Tyler Arboretum, Mt. Cuba Center, Winterthur Museum, Garden and Library, Viridian Landscape Studio and Evolution Landscape Design. Their work  experience in public gardens has given them a strong understanding of maintenance needs for large scale landscapes, as well as conservation and sustainability.

Outside of work, Olivia spends their time making art and working with the medicinal plants they grow in their home garden. They are very proud to have grown the native Passiflora incarnata, maypop, in their garden for the first time in 2021.


Jesus Medel


Jesus Medel, Field Supervisor. Jesus joined GreenWeaver in 2019 as a crew leader. Since then, he has embraced ecological landscaping and steadily taken on more responsibility. Jesus uses creativity and tenacity when handed challenging projects.

Whether it is his first rain garden, or a total backyard renovation with stonework and a water feature, Jesus does the job right. His attention to detail, ability to tackle complex projects, and leadership skills made him the obvious choice for the position of Field Supervisor.

Jesus has a degree in Culinary Arts from the University of the Cloister of Sor Juana (Universidad del Claustro de Sor Juana) in Mexico City, and if we are lucky, he also acts as head chef for GreenWeaver cookouts.




Clara holds dual Bachelor of Arts degrees in Biology and Environmental Studies from Oberlin College, where their studies focused on the botany and ecology of native East Coast flora. Through their work experience in environmental education, Clara has gained extensive knowledge of native plants and wildlife. They harness their passion for ethical, ecological gardening to promote wildlife habitat and ecosystem services in their gardening work. Clara is a natural organizer and loves systems of all kinds. They take great pride in leading the Stewardship and Gardening Department to flourish along with the properties we serve.

They hold a Sustainable Landscape Certification (SLC) from the Pennsylvania Landscape & Nursery Association (PLNA) and a Certificate of Merit in Landscape Design from Longwood Gardens.


Mike Redden


Mike has been with GreenWeaver since 2016. A skilled
crew leader, Mike is fanatical about quality and passionate about environmental stewardship. He has experience in all aspects of ecological landscaping, from stormwater management projects to installing complex planting plans.

Always interested in learning more, Mike has completed training as a Chesapeake Bay Landscape Professional and taken classes at Longwood Gardens and Mt. Cuba Center. Mike has a Bachelor’s Degree in Liberal Arts from West Chester University.


Mike Byrne


After six years in urban agriculture and environmental education, Mike joined GreenWeaver in 2020. We knew he would not be a crew member for long, and with quick learning, hard work, and enthusiasm he was soon promoted to Crew Leader. Mike applies his care for the environment and his educational background as he teaches new crew members about ecological landscaping.


Mirna Canales


Mirna Canales joined GreenWeaver in 2019 as a gardener. She now uses her years of horticulture experience, attention to detail, and abundant energy as a Steward in the gardening department. Mirna has a strong eye for aesthetics, which she puts to good use designing container plantings for our clients and decorating the beautiful cakes that she bakes in her spare time.

Mirna grew up in El Salvador and enjoys teaching gardeners new skills... both in English and Spanish!


Sarah Morales


Sarah holds a Bachelor of Science degree in Landscape Horticulture and Design with a minor in Psychology from the University of Delaware, where her studies focused on the science, design, and sustainability of the landscapes we inhabit.

Sarah also completed a Senior Fellowship with the Environmental Leadership Program (DEWN ‘22). She has built an eclectic career over the last decade, where her most recent experience in the environmental education and community engagement fields has given her extensive knowledge of how humans, animals, plants, and the environment are interconnected.

Sarah is a real nerd for pawpaw trees (Asimina triloba) and American persimmons (Diospyros virginiana) and spends far too much time looking for their fruit. You can catch Sarah hiking with her dog, Badger, or not-so-quietly jamming out to music.


Jack Nichols


Jack graduated from Thomas Jefferson University in 2022 with a Bachelor of Science in Landscape Architecture and multiple honors. After college, he worked at a Landscape Architecture & Planning firm where he served on multiple planning and design projects.

His knowledge of ecology and native plants help our team to promote flourishing ecosystems. Jack has been with Greenweaver for over 10 years, and has held many positions including crew member, crew leader, design intern, procurement associate and estimator. When not at work, Jack enjoys spending time outside with his fiancé and their dog, playing disc golf, and rock climbing!


Joe Nichols


Joe began working at GreenWeaver as a summer job when he was in high school. Growing up in the industry, he gained experience and learned valuable skills from family, experienced crew leaders, and team members alike.

Joe enjoys communicating in both English and Spanish, sharing his knowledge with his team, being physically active, and having the satisfaction of seeing properties transformed through ecological landscape projects.

Greenwaeaver can help you with your sustainable landscaping and gardening needs.

Contact us for more information on your specific project.

Contact Us