Heartwood Consulting Services, LLC
- Heartwood Consulting Services, LLC is a professional forestry and arboriculture consulting firm dedicated to the conservation, preservation and management of trees and landscapes.
- http://www.heartwoodconsulting.net/

Brudi & Partner
- German Consultant specializing in urban forestry analyze the safety of trees world wide with the unique elasto-inclino method (pulling test method). Surveying and tree inventories with award winning ISiman software.
- http://www.tree-consult.org/

John Sevier
- Certified arborist, tree maintenance contractor, and court qualified tree safety expert.
- http://treeexpert.com/

Barmentloo Forestry Consultant
- Consultant for matters relating to commercial plantations and natural forests.
- http://www.barmentloo.net/

Timber Technology Authority, LLC
- Consultation and expert testimony related to wood science and technology, forest products, and wood based structures. Minneapolis, Minnesota.
- http://www.timbertechnology.com/

New England Forestry Consultants, Inc.
- Consultants for the management, utilization and conservation of forest resources. Located in Massachusetts.
- http://www.cforesters.com/