SentinelTree was founded in 2025 by Ryan Jones after a nearly 20 year career in Park operations and arboriculture. Ryan has had the ability to work in many facets of urban forestry in many public sector organizations to include National Park Service, Maryland National Capital Park and Planning Commission- Montgomery Parks, and City of Frederick Parks. He has trained with Olmsted Center for Landscape Preservation in Boston Massachusetts and performed work at many historical sites and cultural landscapes throughout the National Park system. He has aquired many industry certifications to include ISA Certified Arborist, TRAQ, MDDNR Licensed Tree Expert, MDDNR Roadside Tree Expert, TCIA Certified Tree Care Safety Professional, MDA Commerical Pesticide Applicator,and MDA Professional Fertilizer applicator license