- Winton Engineering
- Wiser Co LLC
- Wit Group Inc
- Wittels Engineering
- WLB Group
- Wong Engineers Inc
- Wood & Assoc
- Wood Engineering Inc
- Wood Rodgers Inc
- Wood Rodgers Inc
- Wood Rodgers Inc
- Wood Rodgers Inc
- Woodcrest Engineering
- Woodland Engineering
- Worldwide Land Surveys & Civil
- Worley & Assoc
- WRG Design Inc
- Wunderlin Engineering Inc
- WWD Corp
- Wyman Design
- WYNN Engineering Inc
- Yamabe & Horn Engineering Inc
- YCE Engineers & Surveyors
- Young Technology Group
- Young's Engineering
- Zachary Engineering
- Zapata Engineering
- Zarecki & Assoc LLC
- ZJS Engineering
- Zumwalt Engineering Group
- Zumwalt Hansen & Assoc
