About Us

isa-logo-CLCCLC Tree Services, has been caring for London and area trees since 1988. We pride ourselves on excelling in customer service and work in a timely and efficient manner, leaving worksites in better conditions than when we found them.

CLC Tree Services has the desire, knowledge, expertise and equipment to offer both residential and commercial property owners all aspects of tree services, maintenance and solutions to difficult tree problems. We work closely with various community groups to further benefit our urban trees, plus ensure we do so in an environmentally conscientious manner. Our proactive approach to tree management planning ensures the urban forest will continue to thrive for years to come.

ISA Certified

The International Society of Arboriculture Certified Arborists have the industry credentials to help consumers identify qualified, knowledgeable tree care professionals. Earning an ISA certification is a voluntary activity, but it demonstrates that you have the proper knowledge and skills, as well as a high level of dedication to your profession and your community. ISA Certified Arborists understand the importance of continued education and how it helps to make the world be a better place, one tree at a time.

Professional Affiliations

ISA MemberOCAABBB AccreditedLandscape OntarioLondon Executives AssociationBreakfast Meeting for Women
CLC Meet the Team

Curtis McCallum – Owner

In 1988, Curtis began CLC Tree Services as a stump removal service. Since then, he has gradually expanded the company to its present state, encompassing all tree services. He completed the Ontario Pesticide Training and Certification at the University of Guelph, Ridgetown Campus. Curtis is a committee member of the Better Business Bureau and a board member of the London Executive Association. He has two sons—Luke and Calvin—from his marriage to Anna Marie.

Calvin McCallum – Owner, ISA Certified #ON 1295A

When Calvin was five years old, he began working alongside his father. It is not surprising that sparked a passion for trees. He attended Sir Sandford Fleming College, where he completed the Arborist Program in 2005. Calvin attained his ISA certification and continually adds to that training. He attends workshops, training days, completes online courses, and more to ensure his continued recertification. Calvin’s knowledge, experience and professionalism establish him as a leader in the industry and help propel CLC Tree Services to the next generation of tree services expert.