• Utilities & Environment
3410 Gateway Rd
Brookfield, WI 53045
(800) 522-0372
(888) 280-8837 (fax)
  • About

    When your building performs to our standards, you know it's the best it can be.

    Every day, ESI makes buildings work smarter, benefitting owners, occupants and communities. An integrated, intelligen

  • Directions

    West on I-94 W, take exit 295 toward WI-74/Waukesha F N, Turn right at Cth F/Redford Blvd, turn right to merge onto Capitol Dr/WI-190E, turn right at Gateway Rd.