GSI Consulting - Energy Services GSI Consulting - Energy Services Search | Advanced Search | New Members | Coupons and Discounts | All Categories Sort alphabetically by... Name City Inland Power _ PO Box ASpokane, WA 99219 (509) 747-7151 Member Since: 1985 Learn More | Visit Site Resource Synergy _ 1821 W. 5th Ave, Suite 105Spokane, WA 99201 (509) 796-3749 Member Since: 2021 Sustainability consulting - energy, water, and waste efficiency Learn More | Visit Site If your business isn't here, contact us today to get listed!