Ontario commercial arborists association
HELPING YOU BUILD A BETTER TREE CARE COMPANY

2019 OCAA Board of Directors


President:
Jeremy Hamlin of Shadylane Expert Tree Care

Vice President:
Calvin McCallum of CLC Tree Services

Treasurer:
Mike McNairn of Universal Field Supplies

Secretary:
John Ransom of Davey Tree Expert Co. of Canada Ltd.

Past President:
Patricia Thomson of Thomson Watson Consulting Arborist

Directors:
Mark Graves of Grave Oak Tree care

Christopher Timperson of Bartlett Tree Bartlett Tree Experts


Trish Thomson 
Thomson Watson Consulting Arborist

Past President

General info: 
  • Graduated from the University of Toronto Forestry Program in 1987
  • Worked for the City of Toronto as an Integrated Pest Management Inspector
  • Joined Shady Lane Tree Care in 1990 as a Plant Health Care Specialist
  • In 1991 joined the faculty in the Humber College Landscape Technology Program as a contract instructor in woody plant assessment, tree identification, insect and disease identification and preparation for pesticide licensing for students
  • Spent four years as a Consulting Arborist in Thomson, Bruce and Associates and Patricia Thomson, Consulting Arborist. Both provided professional, scientific plant health consulting services in the commercial, municipal and private sectors.
  • Currently a Consulting Arborist and General Manager for Kelly’s Tree Care since 2001 and became co-owner in February 2010.
  • Certified Arborist (ON-0132A) with the International Society of Arboriculture since 1993



Jeremy Hamlin

Shady Lane Expert Tree Care

President 

General Info: 

  • Educated at Sir Sandford Fleming College as a forestry technician and ecosystem management technician
  • Worked in Ottawa as a forestry technician and logger
  • Became an ISA Certified arborist in 2004
  • Started as a tree worker for Weller tree service in various roles from ground support growing into a production climber
  • Learned some finer points of arboriculture after several years with Authentic Tree care
  • Gained some valuable municipal experience as an arborist with the city of Markham and a Crew leader with the town of aurora
  • Applied experience and joined the power workers union as an electrical forester journey person
  • Rejoined the commercial arboriculture ranks as the operations manager for Uxbridge tree service




Mike McNairn
Universal Field Supply

Treasurer

General Info: 

  • Operations manager for Universal Field Supplies. Worked in the industry as a supplier for over 25 years.
  • Graduate of Fleming College, Forestry program


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