About Us

At Sierra Tech Services (STS), our goal is to help clients meet regulatory requirements promptly and affordably. We deliver professional environmental construction and remediation field support services throughout California and Nevada to clients, including government agencies and environmental consulting firms (local and global), and construction companies. Gauge the Difference STS can make to your projects both in the field and to the bottom line.


Safety awareness is a vital aspect of our work. Since our incorporation in 2007, STS has maintained an exceptional safety record due to our everyday respect for dynamic field environments and our ongoing training, including adherence to ISNet safety, Union Pacific E-Rail, and OSHA’s Hazardous Waste Operations and Emergency Response (HAZWOPER) standards.

In addition to maintaining an exceptional safety record, STS has earned a reputation for extending the same level of care to its business practices. Being respectful of client schedules and budgets, viewing each situation as unique, and working collaboratively with clients often enables STS to suggest novel, yet practical solutions. That responsive, innovative approach helps clients address challenges effectively, while meeting their schedules and controlling, or even reducing, costs.

License & Certifications

STS is certified as a small business and as a woman-owned business by the State of California. STS also carries a C-57 and General A contractor Licenses.

Small Business Certification
State of California Department of General Services
ID# 58446

Certified Woman-Owned Business
Supplier Clearinghouse for the Utility Supplier Diversity Program of the California Public Utilities Commission
Certification VON# 10FS0073

California Contractor State License Board
C-57, General A
License #959309

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