Terraphase Engineering

Terraphase Engineering Inc. is an environmental consulting and engineering firm based in Oakland, California, founded in 2010. The company specializes in providing cost-effective solutions to complex environmental and engineering challenges. Their team includes engineers, geologists, and scientists who work together to help clients achieve their project goals through comprehensive environmental management. Terraphase offers a wide range of services organized into four core areas: Environmental Services, Water Resource Services, Compliance Support, and Site Engineering. Their expertise includes site characterization, groundwater modeling, regulatory support, civil design, and geotechnical engineering. The company also utilizes Geographic Information Systems (GIS) technology to enhance their services, providing tools for data management, visualization, and 3D modeling. With approximately 115 employees, Terraphase serves a diverse clientele, including private and public entities. The firm is committed to technical excellence, responsiveness, and community engagement, fostering meaningful connections through partnerships and local initiatives.

Environmental Services Oakland, United States Founded 2010 ~155 employees

Work at Terraphase Engineering in HR or recruiting? Claim this page

Employees
155
+2% in the 3 months to Sep 2026
Revenue / employee
$83.4K
Revenue ~$12.9M
Total funding
$305K
Last round Jul 2023
12-month attrition
5.9%
Tech: 10.6%
H1B filings, FY2026
1
Sponsors visas
Open jobs
6
Last 30 days

Headcount trend

Terraphase Engineering went from 133 employees in Oct 2024 to 155 in Sep 2026. Apr to Sep 2026: 6 people joined, 4 left.

Org structure

Headcount by department

Other78
Engineering48
Operations12
HR6
Finance4
Sales4
Marketing2
Success1

H-1B sponsorship

H-1B Sponsorship Limited
H-1B Filings by Department
Engineering2

The department split adds up all the years listed above. FY2026 alone: 1 filings.

Funding

  • Jul 2023 ยท $305K

Peer reviews

Worked with someone at Terraphase Engineering?

Anonymous peer reviews on OffTheRecord

Read or write a review

Hiring now

Similar companies

Terraphase Engineering FAQ

How many employees does Terraphase Engineering have?

Terraphase Engineering has about 155 employees, up 2% over the 3 months to Sep 2026.

Does Terraphase Engineering sponsor H1B visas?

Yes. Terraphase Engineering filed 1 H1B (LCA) application in FY2026, according to the latest U.S. Department of Labor disclosures. It was for a Engineering role.

What is Terraphase Engineering's revenue per employee?

Terraphase Engineering makes about $83K in revenue per employee, based on $12.93M annual revenue and 155 employees.

How much funding has Terraphase Engineering raised?

Terraphase Engineering has raised $305K in total funding.

Data from Company Prospectus, DOL LCA disclosures, WARN notices and 6figr salary profiles.