Impact investing has been on a lot of people’s minds lately in philanthropy, including ours. We are curious about how different foundations imagine and develop their strategies, and the Heron Foundation is one funder that’s been a real leader in this area. As we’ve previously reported, Heron is working to move its full endowment of some $300 million into investments that align with its mission by the end of 2017.To learn more about what Heron is up to, we got on the phone with Toni Johnson, who is a vice president charged with forging the path for Heron’s long-term public influence and engagement strategy.