- Westec Interactive Security
- Westmoreland Protection Agcy
- Westside Security
- Whalers Village Security
- Whelan Security
- Whelan Security Co Inc
- Whelan Security Co Inc
- Whittemore Associates Inc
- Williams Associates Security
- Williams Associates Security
- Williams Security
- Windwood Guard House
- Wingfield North Security Ofc
- Wired For Tomorrow
- WMP Security Svc Co
- Wolf Investigations Inc
- Woodfield Country Club Gatehse
- Woods Guardhouse
- Works
- World Security Initiatives Inc
- World Security Svc Inc
- Worldwide Security Assoc
- Wright & Sons Security LLP
- Wright & Sons Security LLP
- Wright Guard Security
- Wyndham Guard House
- Xanthous Security Co Inc
- Xtreme Protection Svc
- Yale Enforcement Svc
- Yale Enforcement Svc
- Yarbough Corp
- Yarbrough Security
