Over 100 years combined experience!

RICK COBER

Rick graduated from Arizona State University with a B.S. in Environmental Horticulture. A certified arborist  (WE-3474A) with 40+ years of experience in Arizona & California building Nursery  & Greenhouse facilities as well as consultant to developers, landscape professionals, and homeowner associations.  Rick is active  with the ANA (Arizona Nursery Association) ALCA (Arizona Landscape  Contractors Association) ACTC (Arizona Community Tree Council) and is a TREE Fund liaison board member for the WCISA (Western Chapter  International Society of Arboriculture). 

ROGER HARTZOG

Roger graduated from the University of Florida as a Natural Resources Manager and Environmental Engineer, attending the School of Graduate Studies in Environmental Engineering. Worked with the U.S. State Department in Central America on programs involving resources conservation and engineered environments. Directed the Water Quality Management Program for the State of Louisiana until accepting an Attorney General’s appointment as Executive Director of the Western States Project, headquartered in Phoenix and administering environmental projects in 9 States, 3 Canadian Provinces, and 2 Mexican States. Over the past two decades Roger has served as a real estate Broker and a Community Manager. 

CRAIG WEINSTEIN

Craig graduated from Southern New Hampshire University with a B.S. in Marketing. The first 20 years of his career was spent on Wall St. as a trader in the energy markets. He has since discovered his love for trees and making a difference in the community. Craig is results focused business professional with an entrepreneurial mindset.   He plays a key role in the sales and marketing at Tree Theory.

JANET WAIBEL

Janet is the principal landscape architect at Waibel & Associates as well as being the author of SLM on top of that she is also a certified arborist.  She is responsible for project design and plan development.  Twenty years in the professional field of landscape architecture has afforded Janet the opportunity to establish numerous positive working relationships with many contractors, suppliers and professionals involved in the design and construction industry. Janet is a registered landscape architect in Arizona, with experience in the landscape design, planning and horticultural professions and has participated in all areas of the landscape and construction process from planning, conceptual design and layout stages, through preparation of construction documents and project implementation. Waibel & Associates has provided plans for a variety of public and private projects, streetscapes and pedestrian spaces for various types of projects including: parks, plazas, urban spaces, private residences, as well as conducting native tree inventory and salvage work and consultant reviews for private development.