About Us

Our Company


Stewart Environmental, Inc. (SEI) was formed in July of 1997 in Las Vegas, Nevada, to support environmental clients. Mr. Keith Stewart had been employed and/or partners with local firms in Las Vegas since 1990.

Mr. Stewart formed SEI to better serve local and national clients. SEI offers more rapid response to projects and is very cost competitive due to the small size and lower overhead of the company. SEI is respected for the quality of its services and its ability to solve complex problems. Most of all, SEI strives to be responsive to its clients and to provide a practical hands-on approach to its services.


SEI’s consulting services are complemented by subcontracted services of a group of highly qualified individual consultants, drilling and field service firms, chemical analytical laboratories, and remediation contractors.

SEI is an industry leader in soil and groundwater remedial services including designing, operating, and maintaining soil and water treatment systems, carbon treatment, and the use of hydrogen peroxide. SEI is certified and provides services in Arizona, Nevada, and Utah.

SEI employs two Nevada Certified Environmental Managers (Certified with NDEP since 1992), who have a combined 57 years of experience performing Phase II Site Assessments and soil/groundwater remediation of over 200 gasoline service stations and convenience stores. SEI also employs several field technicians who are skilled in assessment and remedial activities.