OIL AND GAS ENGINEERING AND INSPECTION SERVICES 
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Project Managers

Senior Inspectors
Build Support 
Welding Experience
Safety Compliance
Training Support 
Work To Company Standards 
Audits During Construction 
Weld Maps
Job Books 
​Startup Support 

Las Colinas Texas Office 

David T. McKenzie                Contact david@zengineeringgroup.com 
222 Las Colinas Blvd, Irving Texas 75038, Suite 1650
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David T. McKenzie President
BS Chemical Engineering 

Top Inspection Code Compliance 

ASME 31.3
ASME 31.8
ASME 31.4
NFPA 70
API
Title 49. Part 192
ICC IBC
​API 1104
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