Personnel – Field Services

Jake Wiggs, QSTI Billings Branch Manager

Jake joined Bison in 2015 as a Project Engineer with the Billings Source Testing group. He has a B.S. in Chemical Engineering from Montana State University in Bozeman. Jake became the Branch Manager for the Billings office in 2016. He oversees stack testing and gas flow monitor (GFM) manufacturing in Billings. Jake has extensive knowledge and experience in flow measurement and stack emission measurement and calculations. Jake has earned his QSTI (Qualified Stack Test Individual) certification from the Source Evaluation Society (SES). Earning this certification proves Jake’s dedication to quality stack testing services. A QSTI designation certifies

Jake Wiggs, QSTI Billings Branch Manager2019-01-11T14:20:00-07:00

Mark Severson, P.E. Arizona Branch Manager

Mark rejoined Bison Engineering in 2015 after 20 years in the mining and mineral processing industry. He is responsible for business development activities in the Arizona region and for managing Bison/EEMC services in the Tucson office. Mark is a Professional Engineer with a B.S. in Environmental Engineering from the Montana College of Mineral Science and Technology. During his career, Mark has worked in Montana, Wyoming, Utah, Alaska, California, and Australia. In his various engineering, managing, and global advising roles, Mark managed operational compliance with state, federal, and international environmental regulations. Compliance was achieved through right-sized assurance processes,

Mark Severson, P.E. Arizona Branch Manager2019-05-23T17:40:06-06:00

Kelly Dorsi, PhD Atmospheric Scientist

Kelly joined Bison Engineering as part of the Source Testing group in 2015. Kelly holds PhD and Master’s degrees in Atmospheric and Oceanic Science from the University of Colorado, Boulder. She received her Bachelor of Arts from St. Olaf College in Chemistry and Russian Area Studies. Her primary responsibilities include processing of field data, report generation and quality assurance. As part of her role she works to improve existing, and develop new, tools and templates for data processing. She is also proficient in EPA source testing methodology and works with the Source Testing group to conduct compliance

Kelly Dorsi, PhD Atmospheric Scientist2019-01-11T14:02:05-07:00

Don V. Milmine, E.I.T. Project Engineer

Certifications: Engineer In Training MSHA/OSHA Safety Trained HAZWOPER Certified Don is a Project Engineer ll and has been with the Ambient Monitoring group in the Billings office of Bison since 1999. He has been providing technical services to industrial and governmental clients for over 37 years. He holds a Bachelor of Science degree in Environmental Engineering from Montana Tech. His project assignments commonly include ambient air and meteorological data collection, quality assurance, processing and reporting. He performs quality assurance audits, calibrations and maintenance on a variety of ambient monitoring systems, including PM10, PM2.5, SO2, and meteorological installations.

Don V. Milmine, E.I.T. Project Engineer2019-04-24T08:55:59-06:00

Steven R. Heck Meteorologist/Project Scientist

Steve joined Bison in 2013 and has a Bachelor of Science degree in Meteorology from the University of Utah. He has over 35 years of professional experience in air quality and meteorology consulting, with an emphasis on data analysis and quality assurance. Prior to joining Bison Steve was an independent consultant. He also spent four years as the quality assurance officer for a commercial analytical laboratory. As a Meteorologist / Air Quality Scientist at Bison, Steve leads several ambient air quality and meteorological monitoring projects, including real-time particulate/weather monitoring networks at two EPA-designated Superfund sites. Steve’s responsibilities

Steven R. Heck Meteorologist/Project Scientist2019-01-11T14:30:32-07:00

Zach Harding, QSTI Environmental Scientist

Zach joined the Source Testing group at Bison in 2017. He obtained a Bachelor of Arts in Business Administration with concentrations in Management and Marketing from Carroll College. Zach has three years of experience as a project manager and is certified by the Source Evaluation Society as a Qualified Individual in the performance of source testing. Zach performs air emissions testing in accordance with EPA methods for both compliance and engineering purposes for a variety clients. He has led projects in Title V compliance testing, Boiler MACT, PC-MACT, Subparts JJJJ/ZZZZ engine testing, FTIR instrumentation and relative accuracy

Zach Harding, QSTI Environmental Scientist2019-01-11T14:32:14-07:00

Adam Bender, Q.I. Environmental Scientist

Certifications: Infrared Thermographer Certified MSHA/OSHA Safety Trained IATA/ICAO Dangerous Goods Shipping Certified Method 9, Visible Emmissions Evaluator, Certified First Responder training Certified Adam joined Bison in 2011 and has a Bachelors of Science degree in Geology with an emphasis in Invertebrate Paleontology from the University of Montana.  Adam has five years of civil engineering experience as a land surveyor and two years of experience as a field geologist in gold exploration. At Bison Adam is a project manager and source testing team member who specializes in isokinetic test methods. He is chairman of the safety committee and

Adam Bender, Q.I. Environmental Scientist2019-03-19T14:47:52-06:00

Conor Fox, QSTI Environmental Scientist

Conor joined Bison in 2017 as a member of the Source Testing group. He has a Bachelor of Arts in Environmental Studies from Carroll College and is an environmental scientist in the Helena office. Conor has six years of experience as a project manager and compliance inspector. He has completed the qualified source testing individual (QSTI) certification in Groups I, II, III and IV with the Source Evaluation Society. Conor is a project manager for air emissions testing in accordance with EPA methods for both engineering and compliance purposes for a variety of clients. He has extensive

Conor Fox, QSTI Environmental Scientist2019-01-11T13:49:56-07:00

Leslie “Sam” Zierke GFM Supervisor

Sam joined Bison in 2015 through the acquisition of EEMC/EMRC. Sam has an Associates of Arts degree in Applied Science from Northwest College in Powell, Wyoming. He started working for EEMC/EMRC in 2008 on the stack testing crew and eventually his experience led him into the manufacture of gas flow monitors (GFM). Sam currently works in the GFM group in the Billings office, where he has helped to design and manufacture GFM using his experience in flow measurement and electronics. He is also involved in tech support for GFMs and performs IT support for the Billings office.

Leslie “Sam” Zierke GFM Supervisor2019-01-11T14:03:00-07:00

Jennifer Kessler Environmental Scientist

Jenn joined the Source Testing group at Bison in May 2017. She holds a Bachelor of Science degree in Environmental Management from University of Maryland University College. In addition to report writing, Jenn has assumed some lab manager duties; she processes source test filters and samples and maintains filter/sample tracking records. She helps oversee equipment and chemical inventories, and tracks safety and testing certifications and renewal dates. Jenn assists with source testing projects as needed. She previously worked as a leak detection and repair (LDAR) technician for petrochemical and natural gas facilities. This testing included Method 21

Jennifer Kessler Environmental Scientist2019-01-11T13:55:39-07:00
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