Operation Engineers Local Union 3

Operation Engineers Local Union 3 is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Engineers Consulting
• Labor Organizations

North American Industry Classification System (NAICS) Categories:

• Engineering Services > Engineers Consulting
• Labor Unions And Similar Labor Organizations

Standard Industry Classification (SIC) Categories:

• Labor Unions & Similar Labor Organizations
• Engineering Services > Engineers Consulting