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About Keystone Engineering
This profile covers Keystone Engineering, a company reporting $1M-$5M in annual revenue, classified under Engineering Services, based in Ontario, California, United States and employing 11-20 people.
Its primary NAICS classification is 541330 (Engineering Services). Keystone Engineering is one of 7,660,543 companies listed in California.
Business Contact Information
- Phone
- +1 (909) 9370094
- Address
- 1600 Excise Ave, Ontario, California, 91761, United States
Industry & Classification
NAICS Codes
- 54Professional, Scientific, and Technical Services
- 5413Architectural, Engineering, and Related Services
- 541330Engineering Services
SIC Codes
- 87Engineering, Accounting, Research, Management, And Related Services
- 871Engineering, Architectural, And Surveying
- 8711Engineering Services
Company Details
- Employees
- 14 (11-20)
- Annual Revenue
- $1.9M ($1M-$5M)
Keystone Engineering: frequently asked questions
What does Keystone Engineering do?
This profile covers Keystone Engineering, a company reporting $1M-$5M in annual revenue, classified under Engineering Services, based in Ontario, California, United States and employing 11-20 people.
Where is Keystone Engineering located?
Keystone Engineering is headquartered at 1600 Excise Ave, Ontario, California, 91761, United States.
How many employees does Keystone Engineering have?
Keystone Engineering has about 14 employees (the 11-20 range).
What is Keystone Engineering's annual revenue?
Keystone Engineering's annual revenue is estimated at $1.9M (the $1M-$5M range).
What industry is Keystone Engineering in?
Keystone Engineering's primary NAICS code is 541330 (Engineering Services).
How can I contact Keystone Engineering?
Its phone number is +1 (909) 9370094.
Largest companies in California
Largest companies on Factur
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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