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

ISA Certified Arborist

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

Mark Voss

Vice President

Mark is capable of handling any task brought before him. So far, nothing he’s seen of the daily challenges at JTC has proven too much for him to handle. His background in South Dakota’s agricultural industry and as an over-the-road truck driver solidifies his position as JTC’s HandyMan #1.

ISA Certified Arborist

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.


Daniel Johnson

Project Manager

Daniel came to work at his grandad’s business the very second that he was of legal age. Even though Daniel is surrounded by Minnesota Vikings fans and he is a Viking by bloodline, Daniel remains loyal to his football team of birthright: the Denver Broncos.