Understanding the California Class A General Engineering Contractor License

  • July 2, 2025
Surveyor using a theodolite at construction site.
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In California, the Class A General Engineering Contractor License is essential for professionals working on large-scale infrastructure projects. This license, issued by the Contractors State License Board (CSLB), allows contractors to engage in projects that require specialized engineering knowledge, such as highways, bridges, water systems, tunnels, and other major public works.

Having a Class A license signifies that a contractor has the expertise to handle complex projects that go beyond general building. It enhances credibility, opens the door to lucrative public and private contracts, and ensures compliance with California construction law. Without the proper license, working on engineering-related jobs is illegal and can lead to penalties, lawsuits, and project shutdowns.

To obtain a Class A license, applicants must:

  • Be at least 18 years old
  • Possess a valid Social Security or ITIN
  • Have at least four years of documented journey-level experience in general engineering work
  • Pass both the CSLB Law & Business exam and the trade exam specific to Class A

A Faster Alternative

However, many contractors choose a faster route by partnering with an RMO (Responsible Managing Officer). An RMO is a licensed contractor who allows a company to operate under their license while maintaining control over the company’s construction operations. This path is especially beneficial for those who lack the required documented experience or want to avoid taking the state exam. RMO Agency can help guide a person through the process of obtaining a qualified RMO and assist in staying CSLB compliant.

By working under an RMO, individuals can start bidding on and managing Class A projects legally while gaining hands-on experience. It also provides a chance to learn directly from a seasoned professional.

Whether earning the license independently or through an RMO, the Class A license is a powerful asset in California’s competitive construction industry. It’s the key to unlocking a broader scope of work and long-term business growth.

Need a license through an RMO? Click HERE for more info.

Have a license and want to become an RMO? Click HERE for more info.

Check out the CSLB for a list of License Classifications