Leadership Team

Broadbent’s leadership team is committed to the fundamental tenets that have brought the company decades of success — safety, fiscal conservancy, efficiency, honesty and integrity, a strong work ethic and camaraderie.

Douglas Guerrant

Mr. Douglas Guerrant
Principal Hydrogeologist, PG, CHG, CEM
Guerrant has more than 28 years of experience covering a wide range of hydrogeologic applications including environmental, water resource, and mining issues. Guerrant has been with Broadbent since 1991 where he currently serves as President, Board Chairman and Principal Hydrogeologist. More >>

Lonnie Roy

Mr. Lonnie Roy
Principal Engineer, PE
Roy has more than 26 years of experience in civil and environmental engineering projects throughout the western United States. Roy has been with Broadbent since 1996 where he currently serves as Corporate Vice-President, Board Officer, Henderson, NV Office Manager, and Principal Engineer. More >>

Troy Crain

Mr. Troy Crain
Principal Geologist, PG, CAPM, CEM
Crain has approximately 28 years of experience conducting environmental, geological, hydrogeological consulting services throughout the western United States. Crain has been with Broadbent since 1990 where he currently serves as Corporate Treasurer, Board Officer, Boerne (San Antonio), TX Office Manager, and Principal Geologist. More >>

Scott McNulty

Mr. Scott McNulty
Principal Geologist, PG, CHG, CEM
McNulty has approximately 21 years of experience conducting environmental, geological, air quality consulting services throughout the western United States. McNulty has been with Broadbent since 1995 where he currently serves as a Board Member, Air Quality and Stack Testing Division Manager, and Principal Geologist. More >>

Kirk Stowers

Mr. Kirk Stowers
Principal Geologist, PG, CEM
Stowers has approximately 24 years of experience conducting, managing, and supervising subsurface soil and groundwater characterization and remediation investigations relative to release of petroleum hydrocarbons/hazardous materials. Stowers has been with Broadbent since 1992 where he currently serves as a Principal Geologist and as the Environmental Division Manager for the Henderson, NV office. He has also served as a Board member. More >>

Randy Miller

Mr. Randy Miller
Principal Engineer, PE, CEM
Miller has approximately 23 years of experience focused on technical, design, field, and management aspects of soil and groundwater characterization and remediation projects and he has managed hundreds of investigations for a variety of clientele. Miller has been with Broadbent since 1993 where he currently serves as a Principal Engineer and as the Manager of the Reno, NV office. He has also served as a Board member. More >>

Mark Kazelskis

Mr. Mark Kazelskis
Principal Geologist, PG, CHG, CEM
Kazelskis has approximately 23 years of experience focused on conduct, management, and/or supervision of environmental, water resource, geologic, and mining investigations. Kazelskis has been with Broadbent since 1993 where he currently serves as a Principal Geologist. He has also previously served as a Board Member. More >>