- Vector Structural Engineers
- W R Ramsey & Assoc
- W W Engineering Inc
- W2SD
- Walter G Seek & Assoc
- Way Consulting Engineers Inc
- WCA Structural Engineering
- Welsch Engineering Inc
- Welton Structural Design
- West Coast Engineers Inc
- West Coast Structural Engrg
- WGPM Inc
- Whitlock-Dalrymple-Poston
- William G Dryden & Assoc
- Williams Engineering Assoc PC
- Winstead Engineering Inc
- Winters Engineering Co
- WISS Janney Elstner Assoc Inc
- Woodland Engineering
- Woods Peacock Engineering
- Woods Peacock Engineering Inc
- Wooldridge-Waibel Engineering
- WRE Structural Solutions
- Young Engineering
- Zamora Engineering Inc
- Zamora Engineering Inc
- Zijderveld Engineers
- Zinser Grossman Structural
- Zinser Grossman Structural
