RSK Group
Construction · Helsby, California
Products & Services
About RSK Group
RSK has grown into a leading integrated environmental, engineering and technical services business, providing end-to-end services. This profile covers RSK Group, a company based in Helsby, California, United States, operating in Industrial construction, employing 18,710 people, reporting $11,909M in annual revenue and classified under Environmental Consulting Services.
Its primary NAICS classification is 541620 (Environmental Consulting Services). RSK Group is one of 26,724 Construction companies listed in California.
Business Contact Information
- Phone
- +44 1928726006
- Website
- www.rskgroup.com
- Address
- 172 Chester Road, Helsby, California, WA6 0AR, United States
Industry & Classification
- Industry
- Construction
- Sector
- Construction
- Segment
- Industrial construction
NAICS Codes
- 54Professional, Scientific, and Technical Services
- 541Professional, Scientific, and Technical Services
- 5416Management, Scientific, and Technical Consulting Services
- 54162Environmental Consulting Services
- 541620Environmental Consulting Services
- 5413Architectural, Engineering, and Related Services
- 54133Engineering Services
- 541330Engineering Services
SIC Codes
- 89Miscellaneous Services
- 899Miscellaneous Services
- 8999Environmental Consulting Services
- 87Engineering, Accounting, Research, Management, And Related Services
- 871Engineering, Architectural, And Surveying
- 8711Engineering Services
Company Details
- Employees
- 18,710
- Annual Revenue
- $11.9B
RSK Group: frequently asked questions
What does RSK Group do?
RSK has grown into a leading integrated environmental, engineering and technical services business, providing end-to-end services.
Where is RSK Group located?
RSK Group is located at 172 Chester Road, Helsby, California, WA6 0AR, United States.
How many employees does RSK Group have?
RSK Group has about 18,710 employees.
What is RSK Group's annual revenue?
RSK Group's annual revenue is estimated at $11.9B.
What industry is RSK Group in?
RSK Group is in the Construction / Construction industry, and its primary NAICS code is 541620 (Environmental Consulting Services).
How can I contact RSK Group?
Its website is www.rskgroup.com and its phone number is +44 1928726006.
What companies are similar to RSK Group?
Other large construction companies in California include Hyundai Engineering & Construction Co. Ltd, Takenaka Corp, Daewoo Construction and Royal BAM Group nv.
Largest construction companies in California
Largest companies in California
Largest construction companies
Manufacturing sales in California, 2026
In California, Factur's 2026 study counted 98 manufacturing quotes worth $14.7M and 18 purchase orders over 12 months: 18% of quotes became orders, against 21% nationally. See the California data.
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