- World Consulting Engrg Co
- WRC Engineering Inc
- Wright Water Engineers Inc
- WRMS Engineering Inc
- WRP Enterprises Inc
- Wunderlich-Malec Engineering
- WWES Assoc
- WWES Assoc
- Wy'East Engineering
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- Xebec Engineering Svc
- Xtest Inc
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- Yates Engineering Svc LTD
- York Engineering Svc
- Young Chen Engineering
- Young's Lab
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- Ys Design LLC
- Yu Engineering
- Zak Electrical Engineering
- Zancanella & Assoc
- Zao Engineers LTD
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- Zelos Consulting LLC
- Zerwin Co Inc
- Zeta Design
- ZFA Structural Engineers
- Zgouvas & Assoc
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