Tyler Arboretum Staff Members

Meet our Senior Management Team

Shipley Allinson
Acting Executive Director
Tel: (610) 566-9134
Extension: 207

Shipley AllinsonShipley Allinson is the Tyler Board of Trustees President and has assumed the responsibilities of Executive Director during the search for a new permanent Executive Director. Shipley is a certified landscape designer; he studied landscape design and plant science at the University of Delaware where he received his Bachelor of Agriculture in 1980.

Shipley has been designing beautiful gardens and outdoor living spaces throughout the tri-state area of Pennsylvania, Delaware & Maryland since 1981. His garden designs are created to serve the specific needs of the client and are customized to utilize the particular assets of each unique site. He has been recognized with many awards for excellence in landscape design by the Pennsylvania Landscape & Nursery AssociationHis private garden in Kennett Square has been featured on garden tours sponsored by Longwood Gardens, The Pennsylvania Landscape & Nursery Association and Tyler Arboretum.

His professional affiliations include membership in the Pennsylvania Landscape & Nursery Association where he is a Pennsylvania Certified Horticulturist (PCH). Additionally, he is a certified member of the Association of Professional Landscape Designers and a Certified Nursery Professional- Landscape Design Specialist in the state of Delaware.

Mike Karkowski
Director of Horticulture
Tel: (610) 566-9134
Extension: 222

Mike came to Tyler in 2004. He is responsible for the management of the Arboretum’s Horticulture Department, which maintains Tyler’s collections, plant records, natural areas, hiking trails and historic buildings. Mike earned a Bachelor of Science from Purdue University in Landscape Horticulture and Design. His previous work includes Horticulturist and Director of Physical Plant and Grounds for The American College and Hardscape Consultant for a North Shore firm in the Chicagoland area. Mike enjoys building projects at home and church, building tree houses for his two children and kayaking with family.


Amy Mawby
Director of Public Programs
Tel: (610) 566-9134
Extension: 214

Amy-MawbyAmy came to Tyler in 2013. She is responsible for the management of the Arboretum’s Education Department and oversees the coordination of volunteer services and Visitor Center staff and operations. Amy earned a Bachelor of Science from Cornell University and a Master of Science degree in Public Horticulture from the University of Delaware’s Longwood Graduate Program. She previously worked as Education Coordinator for Bowman’s Hill Wildflower Preserve and has interned at Morris Arboretum, the New York Botanical Garden and Cornell Plantations. Amy is a bit of a shutterbug and enjoys nature photography.


Meet Our Staff Members

Listed by Department


Beth Hoppe
Tel: (610) 566-9134
Extension: 204


Laura McPhail
Communications Coordinator
Tel: (610) 566-9134
Extension: 208


Mary Beth Jackson
Major Gifts
Tel: (610) 566-9134
Extension: 206

Kathryn Ombam
Development Associate
Tel: (610) 566-9134
Extension: 209

Drew Schmidt
Corporate Development Associate
Tel: (610) 566-9134
Extension: 206

Office Manager

Darcy Gibb
Office Manager
Tel: (610) 566-9134
Extension: 200

Special Events

Sally Rogers
Special Events Manager
Tel: (610) 566-9134
Extension: 210


Martha L. Moore
Youth Education Coordinator
Tel: (610) 566-9134
Extension: 202

Joanne Landau
Tel: (610) 566-9134
Extension: 215

Part-time Educators:

Corinne Davis

Margery Fields

Sue Lucas

Allison Mafodda

Karen McDonald


Education (cont)

Rachel Ndeto

Lauren Ritchey

Vail Ryan

Kristin Simmons

Maria Wanenchak


Alison Dame
Plant Recorder
Tel: (610) 566-9134
Extension: 221

Austin Deputy
Tel: (610) 566-9134
Extension: 221

Stephanie Santucci
Tel: (610) 566-9134
Extension: 223

Jerry O’Dell
Rhododendron Garden
Tel: (610) 566-9134
Extension: 305 voice message only

Jeff Wilson
Arboretum Manager
Tel: (610) 566-9134
Extension: 219

Paul Strommer
Volunteer Apiarist

Visitor Center

Chris Lawler
Visitor Center Coordinator
Tel: (610) 566-9134
Extension: 212

Joseph Giordano
Visitor Center Associate
Tel: (610) 566-9134
Extension: 212

Annemarie Rapp
Visitor Center Associate
Tel: (610) 566-9134
Extension: 212


Julia Lo Ehrhardt
Volunteer Coordinator
Tel: (610) 566-9134
Extension: 205

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