Our Staff

David L. Johnson


Dave Johnson is a native of Rapid City and the Black Hills. He is proud of the fact that he’s the operator of the region’s most experienced and time-honored tree company. He personally guarantees each customer’s satisfaction with any and all tree work completed by himself and his staff at the Johnson Tree Company.


Masters in Business Administration (MBA) from University of South Dakota, 2003
Graduate of ASCA Arboriculture Consulting Academy, Chicago, 2002
Bachelor of Science in Computer Science from South Dakota School of Mines and Technology, 1983
FAA-Certified Pilot with Commercial and Multi-engine, Instrument and Instructor endorsements

International Society of Arboriculture – Certified Arborist #MW-0340A

605-342-0555 – office & 605-209-0555 – cell

Mark Johnson

Vice President

Since 2002, Mark has been an integral part of the Johnson Tree Company.  His many arboricultural skills include diagnosing and treating trees, operating South Dakota’s largest spade truck, climbing and aerial expertise, as well as being responsible for the training and safety of the crews..  With his background in South Dakota’s agricultural industry and as an over-the-road truck driver, Mark has solidified his position with JTC.

International Society of Arboriculture – Certified Arborist #MW-5543A

605-342-0555 – office & 605-209-8733 – cell

Kathy Deml

Administrative Assistant

Kathy enjoys working with the Johnson Tree Company customers who call her for assistance with their trees, their invoices, their schedules and even with their occasional constructive criticisms of the Johnson Tree Company.