Project Developer at Davey Resource Group, a Past President of International Society of Arboriculture - Experienced Program and Project Developer with a demonstrated history of working with municipalities, non-profit organizations, and utilities supporting them in managing their green infrastructure. Connector of those that believe that trees and the benefits that they provide make stronger and better communities. Inspiring speaker that convinces audiences that a well-managed community forest connects people to nature for the benefit of all humankind.

Matt Grubisich recently joined the staff of Texas Tree Surgeons as their Consulting Manager. Previously he was with the City of Garland 2020 - 2025 as their Parks Director overseeing the maintenance and operations of over 2,500 acres of parks and open space. Previously Matt served as the Director of Operation for the Texas Trees Foundation for the past 10 years. He brings with him over 20 years of operational experience assisting communities prepare for future challenges by enhancing their capacity to implement resiliency projects to create vibrant healthy communities.

Matt holds a Bachelor of Science in Urban Forestry from Iowa State University, is an ISA Certified Arborist, SAF Certified Forester, and has served in a leadership role on numerous local and state Boards and Commissions.

Director of Research and Arborilogist at Rainbow Ecoscience - he provides plant healthcare protocol training and support for Rainbow’s clients nationwide. He has years of practical tree care experience, and conducts field research trials throughout the U.S., with emphasis on plant growth regulators and landscape scale management. Patrick frequently gives talks and guest lectures for green industry groups and has authored numerous articles on tree and shrub care. Patrick has a B.S. in Forest Science from Penn State University, is an ISA Board-Certified Master Arborist and Municipal Specialist, ISA Tree Risk Assessment Qualified, an ASCA Registered Consulting Arborist, a North Carolina Licensed Landscape Contractor, and is currently a member of the Revision Subcommittee for the ANSI 300 Part 2 Soil Management. In addition, Patrick serves as a TreeMaster for TreesCharlotte

Accreditation Auditor/TCIA Qualified Trainer – Kristopher has dedicated over 30 years to advancing tree care, safety training, and urban forest preservation. With experience as a municipal, commercial, and residential arborist, he shares insights and stories from a lifetime in the field. As a Certified Treecare Safety Professional, Certified Tree Climber, TCI Accreditation Auditor, and Red Cross CPR/First Aid Instructor, Kristoffer is committed to the safety and growth of arborists and their communities. He plays a pivotal role in assessing and accrediting tree care companies, driving them toward excellence and adherence to industry standards. His passion for sustainable practices and fostering collaboration makes him a respected leader and advocate in arboriculture.

Andrew Wimmel – Director of Operations and Safety for Sam Hill Tree Care. He is the Section 3 (General Safety) Task Group Chair for the ASC ANSI Z133 2024 revision. He is an ISA Board Certified Master Arborist and TCIA Certified Treecare Safety Professional. When he’s not looking at trees he loves spending time with his wife and kids being active with their community in Arlington, TX.

Ronny Nelson – President, Simply Horticulture and current ISAT President Ronny is an ISA Board Certified Master Arborist and serves as the current Chapter President of ISA Texas. He earned his B.S. in Agronomy and Horticulture from Stephen F. Austin State University. After graduating from college, he worked for industry leaders before starting his own company, Simply Horticulture. He is Tree Risk Assessment Qualified, Texas Oak Wilt Qualified, Tree and Plant Appraisal Qualified, Wildfire Risk Reduction Qualified, TCEQ Licensed Irrigator, Certified Landscape Irrigation Auditor, and TDA Pesticide Applicator. Ronny is a member of the American Society of Consulting Arborists and serves as a consultant on tree appraisal loss and other tree related matters.