Mountain Companies Mountain Companies Search | Advanced Search | New Members | Coupons and Discounts | All Categories Other >> General Contractors >> Utility Contractor Mountain Companies PO Box 191285Boise, ID 83709 | View on Google Maps Jessee Rosin (208) 941-9103 Visit Site Mountain Companies is a full service contractor specializing in utilities, earthwork, excavation, site prep, construction management, and design-build construction methods. Member Since: 2025 Send a message to: Mountain Companies Your Name: Your Email: Subject: Message: (Date: 8/10/2025)