About Us

isa-logo-CLCCLC Tree Services, has cared for trees in London, Ontario and area since 1988. We pride ourselves on excelling in customer service and work in a timely and efficient manner, leaving work sites 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 re-certification. 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.

Administrative Support Staff

CLC Tree Services has a team of highly skilled individuals working behind the scenes in our office. They are the first contact most clients have with us, as they answer the many phone calls and emails we receive on a daily basis. There is so much more to the job than that though. From scheduling estimates, jobs, and training, to sending out invoices, and other correspondence necessary, we couldn’t run CLC without them.

Work Crew

The CLC team would not be complete without our dedicated and highly skilled crew. As CLC Tree Services has grown, so too has the need for the able-bodied individuals who make up our team. Whether they perform jobs such as grounds crew or climbers, every member of our team makes CLC Tree Services a better and stronger company able to complete the tree service work at hand.