TCIA appoints TCIA-approved Auditor/Accreditation Consultants to businesses enrolled in the accreditation process. These Auditor/Accreditation Consultants are available to help your company implement the accreditation program. If an auditor consults with your company, they will not be able to audit it and another TCIA-approved Auditor/Accreditation Consultant will conduct the on-site inspection and complete the audit. For more details about requesting help from Auditor/Accreditation Consultants, contact Jenifer D’Urso.
Accreditation Auditors
Randall J. McDonald PA-01 (Saxonburg, PA)
TCIA-Approved Accreditation Auditor/Consultant, 2006
Randall has been involved in the tree care industry for over 32 years. Following graduation from Paul Smith’s College of Forestry, he learned the art and science of tree care working with The Davey Tree Expert Co. in positions from tree climber to district manager. After working with The Davey Tree Expert Co., Mr. McDonald helped pioneer the introduction and implementation of biostimulants in the tree care industry. As senior vice president for Plant Health Care Inc., he developed new markets and helped research mycorrhizal fungi – an environmentally-friendly method of maintaining and improving tree health – with the Royal Botanic Gardens in Kew, England, and lectured with the U.S.G.A. (United States Golf Association) in Ireland. His approval designation is PA-01. / Contact Randall J. McDonald
Kristoffer Rasmussen, TX-01 (Dallas, TX)
TCIA-Approved Accreditation Auditor, 2020
Kristoffer Rasmussen is a distinguished figure in the Tree Care Industry, renowned for his unwavering passion for trees, safety training, and advancing tree care companies. With a background as an ISA municipal arborist, Certified Treecare Safety Professional, TCI Accreditation Auditor, and Red Cross CPR/First Aid instructor, Kristoffer is deeply committed to ensuring the safety and well-being of arborists and communities alike. His approval designation is TX-01. / Contact Kristoffer Rasmussen
Rebecca Johnson, TX-02 (Austin, TX)
TCIA-Approved Accreditation Auditor, 2025
Rebecca Johnson, a dedicated arborist, is passionate about helping trees and educating those who care for them. As a private consulting arborist, she focuses on outreach and education, teaching homeowners proper tree care techniques. Since 2017, Rebecca has organized the Austin Certified Arborist exam prep course, successfully educating over 300 arborists and aspiring professionals. Recognized with the 2020 ISA President’s Award for her contributions to Women in Arboriculture, she holds multiple certifications, including Certified Arborist, Certified Treecare Safety Professional (CTSP), and TCIA Qualified Trainer. Additionally, she is qualified in ISA Tree Risk Assessment and Texas ISA Oak Wilt and Wildfire Risk Reduction. Rebecca earned her degree in Forestry from Oklahoma State University. / Contact Rebecca Johnson