WILLIAM M. AUBERLE, L.H.D., P.E., BCEE – Principal

Bill Auberle

Bill Auberle has more than 45 years experience in environmental engineering and management. His expertise includes environmental policy and permitting processes, air quality engineering, environmental risk assessment and management, and site investigation and remediation.

Bill remains active as a Professor Emeritus at Northern Arizona University. He is co-founder and a member of the Advisory Board to the Institute for Tribal Environmental Professionals (ITEP).

Previously, Bill was President of the national environmental consulting firm of Yates & Auberle, Ltd. In this capacity he directed professionals in the disciplines of environmental engineering, industrial hygiene, hydrogeology, and environmental monitoring and analysis.

Bill also has served governmental agencies as an author and administrator of environmental laws and regulations. He has directed programs in air quality management, water pollution control, radiation protection, noise control, and solid/hazardous waste management. In 1978 and 1979, he managed all environmental protection programs for the State of Colorado.

Bill’s baccalaureate degree in industrial engineering and masters degree in environmental engineering were earned at West Virginia University. He continued graduate studies at Columbia University and the University of Missouri. In 2018, he was a awarded a Doctorate of Human Letters (L.H.D.) from Northern Arizona University. He is a Fellow Member and Past Vice President of the Air & Waste Management Association (A&WMA) and is board certified by the American Academy of Environmental Engineers & Scientists (AAEES). He is a licensed professional engineer in Arizona, Louisiana and Ohio. Bill continues to make numerous presentations at meetings and conferences and contributes many publications in environmental and energy policy, science and engineering.

Curriculum Vitae

Professional Affiliations

CHARLES M. SCHLINGER, Ph.D., P.E., R.G. – Principal

Charlie Schlinger

Charlie is co-founder with Bill Auberle of EN3. His areas of expertise include air and water modeling, GIS, water resources, civil engineering and geosciences, with a history of federal, state, county, municipal, tribal, school district, energy-sector, mining industry and private sector projects. He maintains multi-state registrations in civil engineering and geology.

Prior to forming EN3, Charlie served as a project manager and engineer at Plateau Engineering, where he was responsible for a wide range of civil engineering projects. Before that, Charlie served as a geotechnical engineer and geophysicist for STS Consultants, in Minneapolis, where he engaged in project engineering & management for iron ore mining industry, federal, county and municipal government, and commercial and industrial clients. Prior to that he was employed by SAIC in Nevada where he worked on geotechnical, hydrogeological, and geophysical site characterization activities at Yucca Mountain, Nevada. Early in his professional career, at the University of Utah, he managed geology, geophysics and materials science research projects funded by federal and state agencies, and published extensively in peer-reviewed journals.

Charlie earned a Bachelor of Science degree at the University of Michigan at Flint and his Master of Science in Engineering Degree (Civil and Environmental Engineering) from Utah State University. He earned his Ph.D. at The Johns Hopkins University, with a concentration in geophysics.

After nearly 15 years of full-time service as an engineering professor, Charlie is an Emeritus Associate Professor of Civil Engineering at Northern Arizona University (NAU). His areas of expertise at NAU included: water systems/resources and geotechnical engineering, and surveying. He co-founded the Watershed Research & Education Program at NAU and is a past Director. He also was a founding member and past Director of the Sustainable Water Resources Alliance at NAU.

Curriculum Vitae

Professional Affiliations

KARIN WADSACK – Project Scientist

Karin Wadsack

Karin Wadsack serves EN3 Professionals as a senior scientist and project manager. Her areas of expertise include renewable energy, climate change, statistical analysis, and environmental policy, as well as international development and project management. She also has experience in journalism, sales and marketing, corporate training and operations management.

At EN3, Karin participated in renewable energy regulatory and development projects, reviewing the permit for Dry Lake II wind farm in Navajo County, supporting Navajo County in the development of its wind ordinance, and leading the procurement of a Conditional Use Permit from Coconino County for Arizona Public Service Company’s Community Power Project solar array and substation site. She performed techno-economic analysis of solar development options for the Museum of Northern Arizona. Additionally, she was one of the lead facilitators of the Navajo Generating Station Technical Working Group agreement.

Karin taught construction and managed rainwater-harvesting projects as a United States Peace Corps Volunteer in Bolivia, and worked in system design and installation for a solar and wind installation company in rural Ohio. She has a Certificate in Applied Statistics and an M.S. in Environmental Sciences & Policy from Northern Arizona University, where she focused her research on the economic impacts of wind development in Arizona and policy analysis at the state level. She also has a master’s degree in Mass Communication from Arizona State University and a B.A. in Government from the College of William and Mary.

BRITTANY DESHAZO – Environmental Scientist

Brittany DeShazo assists EN3 with project research and technical documentation. She is an experienced chemist with a demonstrated history in environmental science. Skilled in method development, regulatory specifications, and quality assurance, she is a strong operations professional. Additionally, Brittany is versed in Fourier-transform infrared spectroscopy (FTIR), high-performance liquid chromatography (HPLC) and numerous wet chemistry and microbiology techniques.

Brittany received a Bachelor of Science degree in Molecular Biology and Biotechnology from Arizona State University. Her passion lies in sustainable environmental applications. She has utilized her education and experience as an analytical chemist at multiple environmental laboratories with a specific focus in water and soil analysis. Her work includes regulatory testing for potable water and soil quality testing in agricultural use. Additionally, she has a background in botanical raw material analysis for the development of dietary supplements and food products.


Julia RobertsJulia received a Bachelor of Science degree in Marketing from the University of Arizona and completed post baccalaureate courses in Accounting, also at the University of Arizona. She has provided accounting and bookkeeping services for over 20 years to clients in various industries including non-profit organizations, retail, manufacturing, construction, consulting firms and medical practices. Julia provides project support for EN3 Professionals through data documentation and coordination of project scheduling.