Personnel – Consulting Services

Debbie is a licensed professional engineer in the state of Montana. Debbie joined Bison in 2013 and is the consulting services department manager. Debbie has a Bachelors of Science degree in Chemical Engineering and a Masters of Science degree in Industrial and Management Engineering from Montana State University. Debbie manages and oversees projects primarily for major source clients (e.g., lime manufacturing, power generation, petroleum refining) for construction and operation project permitting (Title V, PSD, and minor modifications), control technology strategy and analysis, applicability analyses, compliance assistance, reporting, compliance audits, enforcement strategy, and agency negotiation. Beyond air quality,

Certifications: Professional Engineer Jeff has over 40 years of experience in engineering and in management of environmental projects and programs in industry, government, and consulting. Jeff joined Bison in 1996 and served as Vice President for many years before assuming the position of President. He holds a B.S. degree in Environmental Engineering from the Montana Tech and an M.S. in Civil/Environmental Engineering from Oregon State University. Jeff is a registered Professional Engineer in Montana. Jeff has served in a variety of technical and management roles at Bison since 1996. At Bison, Jeff has focused on managing environmental

Hal has over 40 years of experience in engineering and in management of environmental projects and programs in industry, government, and consulting. He has a B.A. degree in physics and an M.S. degree in environmental studies.  Hal joined Bison in 1987. Hal retired from Bison in 2014 and now serves as a professional consultant on special projects. Hal has been the project manager for many PSD and NSR permit applications for power generation stations, the lime manufacturing industry, petroleum refineries, a coal-liquefaction facility, compressor stations, wood products facilities, and many other industries. As a project manager, he

Diane is a licensed professional engineer with a B.S. in Civil Engineering from Stanford University and an M.S. in Environmental Engineering from Montana Tech. She started her air quality consulting career at Bison Engineering in 1991. From 1996 through 2016, she worked as an independent air quality consultant while focusing on raising her family. Diane also worked at Montana DEQ for two years as an air quality modeling specialist. Diane rejoined Bison Engineering in 2016. Diane has a great deal of experience in air quality permitting and compliance support for wood products clients in Idaho, Washington, Oregon

Nathan joined Bison in 2005 as an engineer in the Permitting group. He earned a B.S. in Mechanical Engineering and a B.S. in Biology from The Ohio State University, and is a certified Project Management Professional with the Project Management Institute. Nathan works with clients in preparing pre-construction permit applications and modifications, annual emission inventories, compliance audits and certification reports, control technology analyses, operation and maintenance plans, Title V and PSD permit applications, air dispersion modeling, and compliance databases. Nathan also assists clients with all aspects of environmental regulation compliance including periodic air quality reporting, Acid Rain

Certifications: MSHA/OSHA Safety Trained Certified FLIR IR Thermographer Bret joined Bison in 2006 after working two years as a production enhancement/hydraulic fracturing engineer for Halliburton Energy Services in WY, UT, and CO where he performed slick water, hydrochloric acid, CO2, nitrogen, CobraMax, CobraFrac, and pinpoint stimulations. He holds a Bachelor of Science degree in Environmental Engineering from Montana Tech. Bret serves on the Board of Directors for Bison. Over the past 12 years and currently, he oversees and manages projects for thousands of upstream and midstream oil and gas facilities throughout tribal lands, MT, ND, WY, UT, as

Erica joined Bison in 2014. She has a Bachelor of Science degree in Chemical Engineering, a minor in Biochemistry, and a Master of Science in Soils from Montana State University, and a Master of Arts in Mathematical Sciences from the University of Montana. She is a registered Professional Engineer in Montana and Washington. As a project engineer, Erica works with clients in preparing pre-construction permit applications and modifications, annual emission inventories, compliance audits and certification reports, control technology analyses, operation and maintenance plans, Title V and PSD permit applications, air dispersion modeling, and compliance databases. She would

Brian joined Bison in 2013. He works in the Permitting group and frequently assists with source testing projects. He graduated from Carroll College with a Bachelor’s of Science degree in Civil Engineering with an environmental emphasis. Brian has provided air permitting and regulatory compliance assistance to clients from a variety of industries including: limestone, hard rock, and coal mining/processing; timber and wood products; biofuel production and biorefineries; baseline and peaking electrical generation with coal and natural gas, cement production; grain malting; and food production. Brian has specialized in dispersion modeling analyses and supports spatial analyses using Geographic Information

Mike joined Bison in 2013 with a Bachelor of Science degree in General Engineering from Montana Tech of the University of Montana. During the past four years at Bison, Mike has spent most of his time assisting clients in preparing pre-construction permit applications and modifications, annual emission inventories, control technology analyses, operation and maintenance plans, Title V and PSD permit applications, air dispersion modeling, and compliance databases. He works with clients in managing air quality projects for thousands of wellsites and upstream oil and gas facilities throughout MT, ND, WY, and UT. Mike also assists clients with

Kellen joined Bison in 2015. He has a Bachelors of Science degree in Biology from Beloit College and is an environmental scientist in the Helena office. Kellen has five years of experience as a source tester and environmental chemist. As a member of the Source Testing group, Kellen conducts air emissions testing in accordance with EPA methods for both engineering and compliance purposes for a variety of clients. He has extensive experience and knowledge operating Boiler MACT compliance testing, Title V compliance testing, JJJJ and ZZZZ testing, and fourier transform infrared spectroscopy (FTIR), which is used to