Our Team

Jake Wiggs joined Bison Engineering in 2015 as a Project Engineer within the Billings Source Testing group and advanced to leadership of the Billings office. Throughout his tenure, he has held several key leadership roles, including Director of Source Testing and Director of Ambient Services, before taking on his current role as President. He also serves as Chairman of the Board for Bison Engineering and Director of EMRC Gas Flow Monitor (GFM) operations. Jake holds a Bachelor of Science degree in Chemical Engineering from Montana State University.

Jake brings extensive experience in air emissions testing, flow measurement, and regulatory compliance. His technical expertise includes stack emissions measurement, gas flow monitoring systems, and data analysis to support accurate and defensible regulatory reporting. He previously earned designation as a Qualified Stack Test Individual (QSTI) through the Source Evaluation Society (SES), reflecting his training and experience performing EPA reference test methods.

Prior to joining Bison, Jake worked as a Measurement While Drilling (MWD) Engineer with Baker Hughes, gaining hands-on field experience across major oil and gas basins in Wyoming, North Dakota, Colorado, and Texas. He later returned to Montana as a field engineer with Energy and Environmental Measurement Corporation (EEMC), where he managed stack testing projects until the company was acquired by Bison.

Jake has also contributed to the advancement of industry standards through his service on the Board of Directors for the Stack Testing Accreditation Council (STAC), where he helped shape accreditation practices for stack testing organizations nationwide.

Kellen is the director of Bison’s Consulting Services Team, and he serves as the client point for key clients. He is responsible for the overall success of the consulting team including staff recruitment and development, marketing and project oversight. Kellen holds a Bachelor of Science degree in Biology from Beloit College.

He provides air permitting and compliance support for a variety of industries to complete challenging air quality projects and reduce emissions. Kellen prepares permit applications such as pre-construction, Title V operating permits, and registrations for a variety of industries. He also prepares compliance audits and certification reports, control technology analyses, and operation and maintenance plans.

He works with clients to ensure they are operating in compliance with all applicable federal, state, and local environmental regulations by performing complex technical work including managing air permit and regulatory compliance, recordkeeping, periodic air emissions and compliance reporting, etc. Kellen identifies, assesses, and controls environmental risks for new and existing facilities and infrastructure. He also assists in planning for changes to facilities, reviewing new or modified equipment and new manufacturing programs to meet regulatory and company requirements. Kellen’s duties also include monitoring and analyzing developing trends and changes in regulatory compliance laws, rules, and regulations.

Zach Harding, QI, serves as Director of Source Testing for Bison Engineering, providing leadership for source testing operations across three locations. He holds a Bachelor of Arts degree in Business Administration from Carroll College and has over 10 years of experience in air emissions and source testing, with extensive expertise in planning, managing, and executing complex testing programs for a wide range of industrial clients.

Zach is certified in isokinetic particulate sampling methods, gaseous pollutant sampling using instrumental methods, visible emissions evaluations, and Fourier transform infrared spectroscopy testing. In addition to directing field operations and personnel, he provides technical oversight for report preparation, data processing, quality assurance, and technical review. He also serves as Deputy Technical Director on Bison’s Quality Management Team, supporting consistent delivery of high-quality, compliant testing services.

Prior to joining Bison Engineering in 2017, Mr. Harding served as an Environmental Manager at a Title V industrial facility and worked as a project manager performing source testing for industry. His combination of field experience, technical knowledge, and leadership makes him well qualified to manage challenging source testing projects from planning through final reporting.

Kelly Dorsi is an Atmospheric Scientist with over a decade of experience leading air quality programs across the private sector and state government. As a member of Bison’s management team, she provides company-wide strategic direction, business development, and technical leadership, with a focus on expanding service offerings, strengthening client relationships, and delivering high-quality, compliant data solutions for the Ambient Air program. She combines deep regulatory and technical expertise with a collaborative, client-focused approach that advances both operational excellence and business growth. Kelly holds Ph.D. and Master’s degrees in Atmospheric and Oceanic Science from the University of Colorado Boulder, and a Bachelor of Arts in Chemistry and Russian Area Studies from St. Olaf College.

During an earlier tenure at Bison, as part of Bison’s Source Testing Division, Kelly established and cultivated the company’s quality management system, secured Bison’s initial Air Emissions Testing Body accreditation, developed standardized tools and procedures, and cultivated key client accounts while managing complex projects.

Prior to rejoining Bison in 2026, Kelly served as Air Research and Monitoring Section Supervisor at the Montana Department of Environmental Quality, where she directed the statewide ambient air monitoring program. In that role, she led a multidisciplinary team responsible for statewide network operations, data quality, and regulatory compliance, while managing personnel, budgets, and field office operations. She modernized monitoring systems, strengthened quality assurance practices, and fostered key partnerships with state, academic, and industry stakeholders.