Okanagan Similkameen Stewardship is a grassroots charitable organization that assists land owners, managers and community groups in voluntary conservation, stewardship and restoration of important habitats on private lands and within communities of the Okanagan and Similkameen valleys.

In its 10 year history, OSS has planted nearly 30,000 Indigenous trees and shrubs, removed 14,000kg of garbage and invasive plants from sensitive ecosystems, supported improved stewardship over 10,000 acres of critical wildlife habitats, and trained and employed 22 youths.