GSI Engineering Services GSI Engineering Services Search | Advanced Search | New Members | Coupons and Discounts | All Categories Sort alphabetically by... Name City KPFF Consulting Engineers _ 421 W Riverside Suite 524Spokane, WA 99201 (509) 289-2300 Member Since: 2019 Learn More | Visit Site STRATA, Inc. _ 10020 E Knox Ave, Ste 200Spokane Valley, WA 99206 (509) 891-1904 Member Since: 1995 Learn More | Visit Site If your business isn't here, contact us today to get listed!