About Strobert Tree

The tree service experts - Delaware, Pennsylvania & Maryland tree services.

The tree service experts - Delaware, Pennsylvania & Maryland tree services.
mission Statement

Achieving complete customer satisfaction by providing safe solutions to their needs.

Core Values

Customer Satisfaction: We provide safe and cost effective solutions for our customers while following through on delivering quality services.

Safety Culture: Our team oriented approach teaches employees to proactively protect the well-being of the team and the community.

Own the Outcome: We take responsibility for the service, products and the outcome of the work that we do.

Meet the team

Strobert’s hard-working tree crews are devoted to meeting and exceeding client expectations every single day.

Each member of the team utilizes their diverse and extensive experience to execute jobs safely, efficiently, and with keen professionalism.

Our project managers and job superintendents began in the trenches and have been working in the industry for most of their careers. They boast invaluable management and decision-making skills that are vital to our continued success and customer satisfaction.

Andrew Strobert
Owner & President

Arborist profiles

My name is Bill Johnston. I’m an ISA-certified arborist from Pennsylvania and Delaware and have been in the tree care industry for over 35 years. I owned and operated my own tree care company before coming to Strobert Tree Service. Since then, I have focused on what I genuinely enjoy: educating the customer about the health and safety of their trees and shrubs.
I grew up in Haverford, PA, and graduated from Villanova University with a B.A. in 1987. I live in the West Chester area with my wife and three kids, two of whom are currently in college. 
I look forward to meeting you at your property.
Tony joined the Strobert team in 2021, bringing over 25 years of experience in Arboriculture and Horticulture. Tony enjoys spending time with his clients to form strong and trusting relationships.
"My goal is to create customers for life by exceeding expectations throughout the project."
He received a B.S. degree in Environmental Science from Towson University, and he’s also ISA Certified. Tony lives in Chadds Ford, PA with his wife Jennifer and two daughters, Grace and Sophia. In his spare time, Tony enjoys time outdoors, hiking, hunting, and fishing.
Tony Marsalo, BS, Environmental Science
ISA Certified Arborist (PD-2918A)
Sean Freidhof joined the Strobert team in 2023 after working as tree climber after college. He received a B.S. in Forestry from Penn State with a minor in Arboriculture. Sean is an ISA Certified Arborist, Tree Risk Assessment Qualified, and a Certified Treecare Safety Professional. He now happily calls Milford, DE home with his wife Sarah. In his spare time, Sean enjoys fishing, camping, and gardening.
ISA Certified Arborist PD2892-A
ISA Tree Risk Assessment Qualified
Certified Treecare Safety Professional 4357
Maryland Licensed Tree Expert 2527
Joe Maska joined the Strobert team with over 20 years of experience in arboriculture and horticulture. As an ISA-certified arborist with multiple certificates from Longwood Gardens, he has the hands-on knowledge and the education to give his clients the best options for their tree care. 
“ My mission is to provide my clients with the knowledge they deserve to make informed decisions about the services they need”
Joe resides in Wilmington, Delaware, with his wife, Gabrielle, and their three sons, Jack, Everett, and Wesley. In his free time, he enjoys hiking, fly fishing, playing guitar, and spending time with family.

Our Crew

Strobert Tree's Sustainability Planning

Sustainability planning involves taking plant selection, irrigation needs, sun exposure, soil fertility, and wildlife habitat into consideration at every turn. Maintaining the overall health of the landscape is always front of mind for our team as we devise our plans for each property.

What is Sustainability?

Sustainability is the concept that we need to avoid the depletion of natural resources in order to maintain an ecological balance. We must strive to co-exist with nature to provide an environment where we all benefit. We need trees for things such as oxygen, lumber, food, fuel, and an overall mental sense of well-being.

We need to remove or prune tress that become hazardous to people or property and could cause serious damage. The materials from the removal process should not go to the landfill. The materials are recycled into lumber, mulch, and proper products to ensure nothing goes to waste.

The tree service experts - Delaware, Pennsylvania & Maryland tree services.
The tree service experts - Delaware, Pennsylvania & Maryland tree services.

Beautifying and maintaining trees and landscapes since 2000.

Owner & President Andy Strobert founded Strobert Tree Services in Wilmington, DE in 2000, and has been beautifying and maintaining trees and landscapes in the region ever since. His passion for tree care began after high school with only his father’s chainsaw and the family pickup truck in tow. At a young age, he learned the importance of building great relationships with his clients through safe, efficient, and affordable tree services, and has instilled those values in the company today.