Out of an abundance of caution and concern around COVID-19 in general, and in particular the number of fliers/travelers who will have broader exposures in transit who then convene together as a group, we feel it is best to postpone these meetings at this time. We continue to take our direction from global, federal, and local health officials, like the WHO and CDC, and will continue to update our meeting schedule as necessary.


ANSI® Z133 Safety Standards & Procedures 
Workshop Series
with Dr. John Ball and Tim Walsh

ANSI® Z133: The American National Standard for Arboricultural Operations — Safety Requirements (Z133) represents the industry standard for performing tree care operations. The Society of Commercial Arboriculture (SCA) is passionate about promoting safe and efficient work environments within the arboriculture profession, and this is the second year of our multi-state Z133 Safety Standards and Procedures Workshop.

Attendees of this workshop will learn about the incidents that cause the most injuries and fatalities in the treecare industry, and become familiar with the Z133 standards that, if followed, could mitigate life-threatening issues. 

Throughout the full day workshop, attendees will engage in a variety of discussions about the Z133 Standard. Those who complete the workshop will receive 6.5 CEUs and a copy of the Z133 (free of charge).

2020 Workshop Dates


  • New Orleans, LA

  • Louisiana State University

  • Thursday, November 19

  • Space Limited to 60


  • Baton Rouge, LA

  • Louisiana State University

  • Friday, November 20

  • Space Limited to 60


  • Smithfield, RI

  • Stanley Tree Service, Inc.


  • New Jersey

  • Meeting Location TBA

About the Speakers

Dr. John Ball:

John Ball is a Professor of Forestry at South Dakota State University where he instructs courses in arboriculture and forestry. Dr. Ball also teaches rock climbing at the university, as well as the emergency medical technician courses for nursing. He also serves as the campus arborist. 

Dr. Ball has conducted research in a wide range of arboricultural subjects, including tree worker performance and safety. Prior to SDSU he managed tree care companies in the East and Midwest.

Tim Walsh:

Tim is the Corporate Safety Director for the Davey Tree Expert Co. He has a Master’s degree in ergonomics from the University of Massachusetts-Lowell, as well as both a Master’s and Bachelor’s degree in Urban Forestry from the University of Wisconsin-Stevens Point. He is a Certified Treecare Safety Professional, an ISA Certified Arborist and Certified Tree Worker Climber Specialist. 

He is a voting member of the 2022 revision of the ANSI® Z133 and has been involved with the Accredited Standards Committee Z133 for several revisions. 

Tim has also been a climbing arborist for more than 30 years, has owned his own business, worked as a contract climber and worked with companies around the world.

Have a suggestion for a workshop topic or region you would like to see covered?

Send us an email at admin@sca-trees.org!


4 Bicentennial Square

Suite 2B

Concord, NH 03301 


T: 714-639-2200

© 2020 by Epicenter Management

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