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Rank Company
name
address
website
Employees
L.A. County (environmental services)
company total
Revenue (in millions) Environmental Services Offered
(partial list)
Profile
headquarters
offices (L.A./total)
year founded
Top Local Executive
name
title
phone
L.A.
2022
2021
Total
2022
2021
1
Tetra Tech Inc.
3475 E. Foothill Blvd.
Pasadena 91107; tetratech.com
5521
NA
NA $3,504
$3,214
design, consulting, studies, remediation, renewable energy, sustainable infrastructure, solid waste, coastal engineering, water treatment/supply Pasadena
5 / 550
1966
Dan Batrack
CEO, Chair
(626) 351-4664
2
Stantec
801 S. Figueroa St., Suite 300
Los Angeles 90017; stantec.com
2351
26,000
80
63.4
3,884
3,527
site assessment and remediation, permitting and compliance, regulatory liaison, monitoring and management Edmonton, Alberta, Canada
4 / 400
1954
Patrick M McKelvey
Scott Reed
Cara Corsetti
Senior Principal
Principal, Architecture
Senior Principal
(213) 955-9775


3
SCS Engineers
3900 Kilroy Airport Way, Suite 100
Long Beach 90806; scsengineers.com
186
1,100
26
24
439
349
solid and hazardous waste management; landfill gas; site remediation; renewable energy; regulatory compliance for air, water, and soil; biogas; anaerobic digestion Long Beach
6 / 71
1970
Michelle Leonard
Senior Vice President, Project Director
(800) 767-4727
Researched by Deepanjali Batra